4l60e transmission question

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Bill Berndt

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I have a 1996 Tahoe with a 4L60E transmission. My questions relate to the difference in years. I have a rebuilt one from a 1998 pickup. Are the transmissions different? Do they have any difference physically or electronically? Any help would be appreciated.
 

TechNova

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I do not know when they changed, but my 99 Tahoe has a bolt on bell housing.
You should be able to see this while your trans is in the truck.
 

Bill Berndt

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I do not know when they changed, but my 99 Tahoe has a bolt on bell housing.
You should be able to see this while your trans is in the truck.
Thank you. I guess my question is will they interchange? Are they the same length? And do you need to swap power train control modules or wiring?
 

someotherguy

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If your truck is 4WD, I have vague memory of something about the transfer case adapter being different on the one-piece vs. the two-piece cases. So if you're 4WD you'll need the transfer case adapter from the newer truck, too. Otherwise the 98 trans should work fine in your 96. Any earlier you'd have problems. 95 is 95 only; 94 and 93 are on their own as well.

If you have to hunt boneyards for that transfer case adapter, the change from one-piece to two-piece case happened around mid-97.

Richard
 

someotherguy

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Thank you for your information. It is a four wheel drive.
It's a vague memory and I'm not a 4WD guy so you may want to take a close look at it before going on a wild goose chase. I do believe the parts are different, though.

Richard
 

Bill Berndt

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I have the complete transmission and transfer case. I will have to check it out. Do you know if they are the same electronically? I think I read somewhere that the plug in is wired differently.
 

someotherguy

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Sorry.. that I do not know. I'm aware of pinout differences in the later models (GMT800 era) but not in GMT400's, other than in the older 4L60E's than your '96 model. '95 had to add a wire for the PWM control of the TCC; 93-94 didn't have it.

Hopefully someone else knows? I tried to research it but kept finding conflicting info and most of it is for later models.

Richard
 

Bill Berndt

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Sorry.. that I do not know. I'm aware of pinout differences in the later models (GMT800 era) but not in GMT400's, other than in the older 4L60E's than your '96 model. '95 had to add a wire for the PWM control of the TCC; 93-94 didn't have it.

Hopefully someone else knows? I tried to research it but kept finding conflicting info and most of it is for later models.

Richard
 
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