4472 input shaft question
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Today I measured the axial play with a dial indicator, it is 0.087".
I found the GMC Syclone & Typhoon Shop Service Repair Manual Supplement on Ebay. Table of contents lists that the transfer case is covered in section 7D, anyone have knowledge on what the supplement covers for the transfer case? Should I be looking for a Borg Warner service manual?
I found the GMC Syclone & Typhoon Shop Service Repair Manual Supplement on Ebay. Table of contents lists that the transfer case is covered in section 7D, anyone have knowledge on what the supplement covers for the transfer case? Should I be looking for a Borg Warner service manual?
That is the service manual I was eyeing on Ebay, thank you for checking. Looks like it covers disassembly and assembly, maybe there is no specification for it?
I will continue searching for a Borg specific book, or hope someone wanders in with some 4472 expertise can confirm it is okay/normal.
DaveP's Ghost
Well-known member
Ok.
There should be some end play in the input shaft. .087 is quite a bit, but not alarming. Here's the "detail" I couldn't remember until just now:
There are two bronze thrust washers inside that tend to wear. One of them is between the input shaft and the planetary carrier. This particular washer usually shows severe wear upon disassembly. If this washer is worn, input shaft end play increases. I suspect that the washer in your case is worn.
These used to be readily available from Cobra Transmission. I've also turned them over which reduces the end play because a new surface is now being used. The case is not particularly fussy to disassemble and reassemble. No special tools are required. It won't cost anything other than a tube of RTV for the case-halves to take a look and flip the smaller washer over.
Or do nothing. Most of these trucks are now projects that are seldom (if ever) driven any longer. Even if the washer is worn, it probably won't cause any issues for the duration of your ownership. .087 is more than it will be with a new washer, but not "excessive", IMO.
EDIT: It looks like Cobra still catalogues parts for these T-cases. The shaft thrush washer is shown but cannot be "added to cart" so it probably is NOT currently available.
I responded a couple days ago, but took it down as I couldn't remember one detail that is pertinent.. It has been awhile since I had one apart, but I've had a bunch of them on my bench.
There should be some end play in the input shaft. .087 is quite a bit, but not alarming. Here's the "detail" I couldn't remember until just now:
There are two bronze thrust washers inside that tend to wear. One of them is between the input shaft and the planetary carrier. This particular washer usually shows severe wear upon disassembly. If this washer is worn, input shaft end play increases. I suspect that the washer in your case is worn.
These used to be readily available from Cobra Transmission. I've also turned them over which reduces the end play because a new surface is now being used. The case is not particularly fussy to disassemble and reassemble. No special tools are required. It won't cost anything other than a tube of RTV for the case-halves to take a look and flip the smaller washer over.
Or do nothing. Most of these trucks are now projects that are seldom (if ever) driven any longer. Even if the washer is worn, it probably won't cause any issues for the duration of your ownership. .087 is more than it will be with a new washer, but not "excessive", IMO.
EDIT: It looks like Cobra still catalogues parts for these T-cases. The shaft thrush washer is shown but cannot be "added to cart" so it probably is NOT currently available.
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Borg Warner Rear Planet to Ring Gear Synchro Hub Washer, 1900-193-006
Buy Borg Warner Transfer Case Rear Planet to Ring Gear Hub Washer - Transfer Case Parts at Wholesale Pricing. - Call Us Today!
www.allstategear.com
i guess that’s the one
That looks correct, I am probably going to change that one and the other that is listed in the parts diagram I have.
Borg Warner Rear Planet to Ring Gear Synchro Hub Washer, 1900-193-006
Buy Borg Warner Transfer Case Rear Planet to Ring Gear Hub Washer - Transfer Case Parts at Wholesale Pricing. - Call Us Today!
www.allstategear.com
Borg Warner Sun Gear to Planet Washer, 1900-193-005
Buy Borg Warner Transfer Case Sun Gear to Planet Washer Transfer Case Parts at Wholesale Pricing. - Call Us Today!
www.allstategear.com
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That looks correct, I am probably going to change that one and the other that is listed in the parts diagram I have.
Borg Warner Rear Planet to Ring Gear Synchro Hub Washer, 1900-193-006
Buy Borg Warner Transfer Case Rear Planet to Ring Gear Hub Washer - Transfer Case Parts at Wholesale Pricing. - Call Us Today!www.allstategear.com
Borg Warner Sun Gear to Planet Washer, 1900-193-005
Buy Borg Warner Transfer Case Sun Gear to Planet Washer Transfer Case Parts at Wholesale Pricing. - Call Us Today!www.allstategear.com
While I am waiting for the replacements to arrive I went ahead and cracked it open to get it ready for the new one. Dave you hit the nail on the head, here is the old planet -- input shaft washer. The 1900-193-005 washer is in great condition, the 1900-193-006 as shown has a bit of wear and deformation. I should have the new one on Tuesday.
DaveP's Ghost
Well-known member
That one is in bad shape. It looks like has fractured all the way through in one section. I didn't recall that ".087 end play" would be detrimental, but after seeing the washer, it is good that you took it apart for an inspection. I was wrong thinking that .087 wasn't "excessive". Now we know that it is, and that that much play could be associated with a washer that has worn through in places.
After your T-case is reassembeled, would you please measure the end-play with the new washer and post it here? I'm curious as to how much improvement the new washer makes, and what to expect for end play with a new washer. Thanks.
After your T-case is reassembeled, would you please measure the end-play with the new washer and post it here? I'm curious as to how much improvement the new washer makes, and what to expect for end play with a new washer. Thanks.
My thrust washers came today but I received two 1900-193-006 instead of a 1900-193-005 and a 1900-193-006. I measured the thickness of a new 1900-193-006 and compared that to the thickness of my used 1900-193-005. My 1900-193-005 was only 0.001-0.002" thinner, so I decided to not wait for the correct one for that spot. The 1900-193-005 thrust washer had minimal signs of wear so I fell like it contributed little to nothing to the excessive end-play.
I installed the new 1900-193-006 and the axial end-play now is 0.065". At some point I plan to get a backup BW4472, when I do I will revisit this thread and document it's end-play as well.
I installed the new 1900-193-006 and the axial end-play now is 0.065". At some point I plan to get a backup BW4472, when I do I will revisit this thread and document it's end-play as well.