How do I tell if truck is #s matching
- Thread starter 518
- Start date
graham1524
Well-known member
Re: How do I tell if truck is #s matching
Trans has the Vin stamped on the driver side towards the front of the trans. Its almost like a bullet font. The block has Vin stamped on the driver side vertically on the back of the block this one is pretty hard to see
Trans has the Vin stamped on the driver side towards the front of the trans. Its almost like a bullet font. The block has Vin stamped on the driver side vertically on the back of the block this one is pretty hard to see
Captain Morgan
Moderated User
Re: How do I tell if truck is #s matching
I have never been able to find the VIN on a SyTy trans. I've had the drivetrain out of 3 of the 4 trucks I've owned, plus I bought a trans that was pulled from a Syclone back in 2003 and I couldn't find a VIN on that one either, seems everyone feels they are in different locations as well, because I've heard its on the passenger side along the edge of the trans pan, as well as on the sticker thats usually gone or painted over on the top of the trans.
As for the block, Im not sure about any vertical stampings but its written horizontally along the block deck behind the drivers head. 2 out of 3 trucks have had a VIN that was legible, here is the one from Ty 2008 that I owned back in the early 2000's.
I have never been able to find the VIN on a SyTy trans. I've had the drivetrain out of 3 of the 4 trucks I've owned, plus I bought a trans that was pulled from a Syclone back in 2003 and I couldn't find a VIN on that one either, seems everyone feels they are in different locations as well, because I've heard its on the passenger side along the edge of the trans pan, as well as on the sticker thats usually gone or painted over on the top of the trans.
As for the block, Im not sure about any vertical stampings but its written horizontally along the block deck behind the drivers head. 2 out of 3 trucks have had a VIN that was legible, here is the one from Ty 2008 that I owned back in the early 2000's.
dgoodhue
BuSTeD 4.3
Re: How do I tell if truck is #s matching
The transmission out the white/gray 'duck' that you owned (and I have in my possesion) had the matching vin stamped on passenger side just above the tranny pan. The two Syclone trams were stamped on the driver side bell housing.
The transmission out the white/gray 'duck' that you owned (and I have in my possesion) had the matching vin stamped on passenger side just above the tranny pan. The two Syclone trams were stamped on the driver side bell housing.
Captain Morgan
Moderated User
Re: How do I tell if truck is #s matching
oh good, I dont think I ever looked on that trans now that I think about it. maybe I'm not looking hard enough on the other ones? :dunno: :lol:
oh good, I dont think I ever looked on that trans now that I think about it. maybe I'm not looking hard enough on the other ones? :dunno: :lol:
DaveP
Active member
Re: How do I tell if truck is #s matching
OK. There's a thread in The Vault with this info, but the pics are dead. If some Admin wanted to re-host the pics, then replace the posting in The Vault with this one, that would be fine with me. That would preserve this info forever. If I get pissed, and kill the pic links again, that's it. I will never take the 2-1/2 hours to re-post this again.
`````````````````````````````````````````````````````
Here is the front pad. In front of the RH Cyl head. It is usually not clean enough to read with the accessories installed. The last 3 digits are the model year, and the Machine Code. All SyTy engines are "LD". In this case "2LD" indicates a 1992 Typhoon engine. A Syclone engine will be a 1LD. The W is for Romulus where all SyTy engines were produced, and the 10M9 is the date of production, October 09, which for model year 92 would actually have been 1991.
This is the casting date on the rear bell-housing. In this case we have I(eye)18 1. This is September, 18, 1991. The casting date must always precede the assembly date on the front pad. In this case we have casting date of September 18, 1991, and an assembly date of October 09, 1991 which are 3 weeks apart. Works for me.
This is the block casting number. Also on the rear bell-housing flange. AFAIK, all SyTy blocks are 6061's. There is also an upside down "061" on each side of the block near the motor mount bosses. This is pretty straight forward.
This is the VIN stamping. It is on the LH rear of the block, above the oil filter adapter. It can be read with the engine installed looking through the wheel well, or from under the truck with a mirror. Many 93's have this number applied with "laser dots". We've discussed this before. There may be laser dots in 92, and there may be stampings in 93. Either way, those swirly marks under the stamping have to be there.
We have the last 9 of the VIN. TN0810764
T= I'm not real sure, but may be "Truck", as this is the Check Digit position, which is only 0-9, or X.
N = Model year 1992. (M= 91, and P=93)
0= Pontiac West Assembly Plant, where Typhoons were assembled. A Syclone will have an "8", for Shreveport, where Syclones were assembled.
8= Unique model identifier for all SyTy's.
10764= Sequential Number. (Ignore the "1").
Another part of "Matching Numbers" is that the engine front pad assembly date CAN'T precede the vehicle assembly date. Look at the door jamb date, or look up the build date in the Renz/Compnine database. I didn't bother to do so for 92 #0764 as this was a parted-out truck.
`````````````````````````````````````````````````````````````````````````````````````````````````
OK. Transmission.
This is a Syclone Trans. Syclones are the only SyTy I've seen the VIN stamping in this location. Typhoons are discussed below.
TM8802107
T= Again, not sure. Possibly "Truck".
M=1991, it's a Syclone
next 8= Shreveport Assembly, so it's a Syclone
2nd8= Unique SyTy identifier
02107 = Sequential number.
Here is the Transmission Model and Date produced.
It is on the Passenger rear, between the last two pan bolt holes.
This is similar to the Engine Machine code, as all SyTy trans are "LHM" and the digit preceding the LHM is the Model year.
1LHM092B.
1= Model Year = 1991, so it's a Syclone.
LHM = "LH" is the SyTy trans bill of materials, the "M" is TH700 / 4L60 type.
092 is a Julian date, the 92nd day of the year. In this case March 02, which for Model Year 1991 would be 1991. So March 02, 1991. This date again must precede the build date of the vehicle. The build date for Sy #2107 was May 01, 1991. (Beware that 1992 is a Leap Year. If you calculate a 92 Julian in your head, and the Julian is >59, you'll be off a day). Again, works for me.
B= 2nd Shift Production.
This is the location for the VIN stamping on many Typhoons. It is on the horizontal surface right above the Model and Date stamping. If the stamping is not on the bell-housing, look here, but on occasions I've not found a VIN stamping in either location. In this case, use the model and assembly date as your clues. It would be credible to think that if PAS replaced a transmission in their shop prior to shipping, the trans did not get VIN-stamped, as only the assembly plant had that capability.
`````````````````````````````````````````````
So there you have it. A definitive guide to cracking the "Matching Numbers" on a Syclone or Typhoon engine and transmission. I also have pics of the rear axle codes which I have also deciphered, and may ask an Admin to add them later. But for now, I'm done typing and editing.
Hope you find this useful, and informative. If anyone copies this or links this post to another site, that's fine, but please give attribution to its author. Thanks.
DaveP
OK. There's a thread in The Vault with this info, but the pics are dead. If some Admin wanted to re-host the pics, then replace the posting in The Vault with this one, that would be fine with me. That would preserve this info forever. If I get pissed, and kill the pic links again, that's it. I will never take the 2-1/2 hours to re-post this again.
`````````````````````````````````````````````````````
Here is the front pad. In front of the RH Cyl head. It is usually not clean enough to read with the accessories installed. The last 3 digits are the model year, and the Machine Code. All SyTy engines are "LD". In this case "2LD" indicates a 1992 Typhoon engine. A Syclone engine will be a 1LD. The W is for Romulus where all SyTy engines were produced, and the 10M9 is the date of production, October 09, which for model year 92 would actually have been 1991.
This is the casting date on the rear bell-housing. In this case we have I(eye)18 1. This is September, 18, 1991. The casting date must always precede the assembly date on the front pad. In this case we have casting date of September 18, 1991, and an assembly date of October 09, 1991 which are 3 weeks apart. Works for me.
This is the block casting number. Also on the rear bell-housing flange. AFAIK, all SyTy blocks are 6061's. There is also an upside down "061" on each side of the block near the motor mount bosses. This is pretty straight forward.
This is the VIN stamping. It is on the LH rear of the block, above the oil filter adapter. It can be read with the engine installed looking through the wheel well, or from under the truck with a mirror. Many 93's have this number applied with "laser dots". We've discussed this before. There may be laser dots in 92, and there may be stampings in 93. Either way, those swirly marks under the stamping have to be there.
We have the last 9 of the VIN. TN0810764
T= I'm not real sure, but may be "Truck", as this is the Check Digit position, which is only 0-9, or X.
N = Model year 1992. (M= 91, and P=93)
0= Pontiac West Assembly Plant, where Typhoons were assembled. A Syclone will have an "8", for Shreveport, where Syclones were assembled.
8= Unique model identifier for all SyTy's.
10764= Sequential Number. (Ignore the "1").
Another part of "Matching Numbers" is that the engine front pad assembly date CAN'T precede the vehicle assembly date. Look at the door jamb date, or look up the build date in the Renz/Compnine database. I didn't bother to do so for 92 #0764 as this was a parted-out truck.
`````````````````````````````````````````````````````````````````````````````````````````````````
OK. Transmission.
This is a Syclone Trans. Syclones are the only SyTy I've seen the VIN stamping in this location. Typhoons are discussed below.
TM8802107
T= Again, not sure. Possibly "Truck".
M=1991, it's a Syclone
next 8= Shreveport Assembly, so it's a Syclone
2nd8= Unique SyTy identifier
02107 = Sequential number.
Here is the Transmission Model and Date produced.
It is on the Passenger rear, between the last two pan bolt holes.
This is similar to the Engine Machine code, as all SyTy trans are "LHM" and the digit preceding the LHM is the Model year.
1LHM092B.
1= Model Year = 1991, so it's a Syclone.
LHM = "LH" is the SyTy trans bill of materials, the "M" is TH700 / 4L60 type.
092 is a Julian date, the 92nd day of the year. In this case March 02, which for Model Year 1991 would be 1991. So March 02, 1991. This date again must precede the build date of the vehicle. The build date for Sy #2107 was May 01, 1991. (Beware that 1992 is a Leap Year. If you calculate a 92 Julian in your head, and the Julian is >59, you'll be off a day). Again, works for me.
B= 2nd Shift Production.
This is the location for the VIN stamping on many Typhoons. It is on the horizontal surface right above the Model and Date stamping. If the stamping is not on the bell-housing, look here, but on occasions I've not found a VIN stamping in either location. In this case, use the model and assembly date as your clues. It would be credible to think that if PAS replaced a transmission in their shop prior to shipping, the trans did not get VIN-stamped, as only the assembly plant had that capability.
`````````````````````````````````````````````
So there you have it. A definitive guide to cracking the "Matching Numbers" on a Syclone or Typhoon engine and transmission. I also have pics of the rear axle codes which I have also deciphered, and may ask an Admin to add them later. But for now, I'm done typing and editing.
Hope you find this useful, and informative. If anyone copies this or links this post to another site, that's fine, but please give attribution to its author. Thanks.
DaveP
Slyclone
Well-known member
Re: How do I tell if truck is #s matching
Good info Dave. I am sure those who have there trucks/engines pulled will all now know how to identify correctly.
I have the photos you emailed me many moons ago still saved for personal reference.. Funny thing is... I never located any other #'s other than the ones I posted in my photo in my previous post. I looked and looked.. Cleaned and no other numbers in the locations shown/discussed on the trans...
Good info Dave. I am sure those who have there trucks/engines pulled will all now know how to identify correctly.
I have the photos you emailed me many moons ago still saved for personal reference.. Funny thing is... I never located any other #'s other than the ones I posted in my photo in my previous post. I looked and looked.. Cleaned and no other numbers in the locations shown/discussed on the trans...
DaveP
Active member
Re: How do I tell if truck is #s matching
The sticker is a broadcast code sticker. It does not have the VIN on it, as this sticker is applied by the Transmission Assembly Plant for identification purposes. 1LHM, 2LHM, or 3LHM. I've seen a few of these stickers, and while I don't recall if there's information on the sticker other than the Model designator, I know there's nothing of interest on it other than the Model, which contains the year. Same info that's stamped on the RR of the case.
So no loss if it's gone or painted over. It never contained the VIN.
The sticker is a broadcast code sticker. It does not have the VIN on it, as this sticker is applied by the Transmission Assembly Plant for identification purposes. 1LHM, 2LHM, or 3LHM. I've seen a few of these stickers, and while I don't recall if there's information on the sticker other than the Model designator, I know there's nothing of interest on it other than the Model, which contains the year. Same info that's stamped on the RR of the case.
So no loss if it's gone or painted over. It never contained the VIN.
Captain Morgan
Moderated User
Re: How do I tell if truck is #s matching
good to get a straight answer on that, I will cross that bad information out of memory :tup:
good to get a straight answer on that, I will cross that bad information out of memory :tup:
DaveP
Active member
Re: How do I tell if truck is #s matching
Here is a pic of the OP's transmission from another thread he has going.
The sticker is a "GM Goodwrench" rebuilt transmission sticker. These units were (maybe still are?) available through GM SPO, and were usually installed in dealership service departments. They were available on an exchange basis. So this transmission pictured is not the one originally installed in the OP's Syclone.
Here is a pic of the OP's transmission from another thread he has going.
The sticker is a "GM Goodwrench" rebuilt transmission sticker. These units were (maybe still are?) available through GM SPO, and were usually installed in dealership service departments. They were available on an exchange basis. So this transmission pictured is not the one originally installed in the OP's Syclone.
518
Member
Re: How do I tell if truck is #s matching
Wow Dave. I'm not wasting your time at all. You posted extremely valuable information about our trucks for myself and others here. That I couldn't find through the search function. I will hopefully have a nice piece of syty history to share with you tomorrow.
Wow Dave. I'm not wasting your time at all. You posted extremely valuable information about our trucks for myself and others here. That I couldn't find through the search function. I will hopefully have a nice piece of syty history to share with you tomorrow.
dgoodhue
BuSTeD 4.3
Re: How do I tell if truck is #s matching
I copied the thread and put in into the vault. I will rehost the pictures when I have a chance.
I copied the thread and put in into the vault. I will rehost the pictures when I have a chance.
Captain Morgan
Moderated User
Re: How do I tell if truck is #s matching
I will put the pictures on this server so they will always stay with the site.
Just out of coincidence, after bitching that I have never found a VIN on a transmission, I found the number on the trans I took out of one of my trucks laser etched just above that square boss that secures the wiring harness to the trans. I had actually suspected it was not original and was planning on selling.... now I might have to think twice about it :squint:
I will put the pictures on this server so they will always stay with the site.
Just out of coincidence, after bitching that I have never found a VIN on a transmission, I found the number on the trans I took out of one of my trucks laser etched just above that square boss that secures the wiring harness to the trans. I had actually suspected it was not original and was planning on selling.... now I might have to think twice about it :squint:
Jimmy
Banned
Re: How do I tell if truck is #s matching
Those dot matrix VIN stamps are BS. I'd rather have a guy with a big hammer pound that shit into the metal.Like they used to do.
Those dot matrix VIN stamps are BS. I'd rather have a guy with a big hammer pound that shit into the metal.Like they used to do.
RealFastV6
@jb_and_his_coffee
How do I tell if truck is #s matching
It's not "dot matrix" or "laser dots" - it's called dot peen. There's no laser involved.
From a process perspective it's preferable to stamping because the machines are computer controlled rather than some guy setting up the stamp. I agree that it's more difficult to read - but the accuracy of the marking takes precedence over the aesthetics.
It's not "dot matrix" or "laser dots" - it's called dot peen. There's no laser involved.
From a process perspective it's preferable to stamping because the machines are computer controlled rather than some guy setting up the stamp. I agree that it's more difficult to read - but the accuracy of the marking takes precedence over the aesthetics.