non HD to HD tranny upgrade - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-02-2010, 05:07 PM   #11
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Hmmmm I already have the top swap on so I don't wanna snap it that'* why I wanna do the upgrade is there a write up anywhere? What'* the difficulty and im cheap I don't want to have to buy transmission fluid 2 times or will the differential swap not require new fluid? Thanks
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Old 05-02-2010, 05:12 PM   #12
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it'* a little more than the dif you need to swap the output shaft as well. i don't believe there is a write up on doing it yet
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Old 05-02-2010, 05:24 PM   #13
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Is the output shaft the long metal that comes attached to the diff? Morads sent me the lil axle the differential cover and the differential with the metal pole in it heh if anything I would take a crack at it but I don't wanna mess up my transmission
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Old 05-02-2010, 05:28 PM   #14
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The output shaft is the long axle on the diff. It must be pulled and put in from the drivers side. You must be careful not to pull fast or hard. Slow and steady as you go threw the transmission There is a lube dam in the trans can could break if you pull it out the passenger side.
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Old 05-03-2010, 12:21 AM   #15
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yea i was thinking of getting one,is it new or used?
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Old 05-03-2010, 03:19 AM   #16
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Quote:
Originally Posted by radomirthegreat View Post
As for the 4T60E question, that transmission is different, uses a different PCM and some more vacuum lines to run, and is old. I wouldn't use it in a car designed around the 4T65E.
No, I've got an '97 SE. The 4T60-E is stock equipment.

I'm just wondering if you can upgrade a 4T60-E to the 4T60E-HD by swapping the same parts.
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Old 05-03-2010, 04:16 AM   #17
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Ah, yes, I see what you mean. I think the only difference between the HD and the non-HD versions is still going to be just the differential and, if the diff size varies, an output shaft on the passenger side. You'd have to check with someone who has taken apart these transmissions, though.
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Old 05-03-2010, 08:53 AM   #18
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I've done a lot of swaps and mixes.

For the OP: You will need
Diff
Diff cover
Output shaft
Passenger side HD axle (axle is shorter because the diff is bigger)

Overall this is a pretty easy swap. One of the biggest tips is to ensure the diff cover sits 100% flush against the trans before bolting it. If it doesn't sit flush...the bearing behind the park gear has slide and you need to goop it back in place. Very easy..just need to know that the diff cover will tell you if things are right before you put a bolt in.

Colin: Don't know. Never tried it. Parts appear to be the same, just for the other trans.
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