I need to rebuild.. Procharged???

**Street Wolf** · 09-09-2008

Originally Posted by Quicklynx

I'm at looking Ed Morad's ebay site and he has everything I would need. I'm curious though, is there any difference between the supercharged and non supercharged block and transmission or can I save a couple of bucks and buy the non supercharged versions??? Also do these fit right into our engine bay or do I need new mounts, fabrication, etc.???

Yes, the motor and trans is both different from a GT to a GTP. It all bolts up the same but a GT transmission will not hold up to any kind of power unless you upgrade it to a HD set-up which the GTP already has.

The motor on the GT is higher compression than the GTP engine, which isn't a bad thing at all really. You would just be putting out more power using the GT motor with less boost than the GTP.

**Sabrewings** · 09-09-2008

The non-HD trans will take plenty of power since it's fundamentally the same as the HD. The only thing you would need to be careful of are burnouts. The HD has a larger diff which takes to one-wheel burnouts a lot easier than the smaller non-HD diff. Other than the differential, they are the same.

**Quicklynx** · 09-09-2008

Originally Posted by Sabrewings

The non-HD trans will take plenty of power since it's fundamentally the same as the HD. The only thing you would need to be careful of are burnouts. The HD has a larger diff which takes to one-wheel burnouts a lot easier than the smaller non-HD diff. Other than the differential, they are the same.

So if I uprgrade the differential... it's the same transmission?!?!

**Sabrewings** · 09-09-2008

Originally Posted by Quicklynx

So if I uprgrade the differential... it's the same transmission?!?!

A little more than the differential, but once that's done then yes (strength wise). The differential, sun gear, differential housing, and output shaft are all needed to do the full conversion. The only reason the output shaft is on there is the HD one is a bit longer to fit in the HD diff right. Not a strength increase.

The only difference between a 4T65E-HD and a non-HD with the upgrade is the drive chain. Again, not a strength difference, but the gearing is different to provide a different gear ratio to the HD. It actually works out easier for non-HD owners since 3.29s only require a diff upgrade. For HD owners to get 3.29s they have to take their side cover off and swap the chain/sprockets.

**Quicklynx** · 09-09-2008

Originally Posted by Sabrewings

A little more than the differential, but once that's done then yes (strength wise). The differential, sun gear, differential housing, and output shaft are all needed to do the full conversion. The only reason the output shaft is on there is the HD one is a bit longer to fit in the HD diff right. Not a strength increase.

The only difference between a 4T65E-HD and a non-HD with the upgrade is the drive chain. Again, not a strength difference, but the gearing is different to provide a different gear ratio to the HD. It actually works out easier for non-HD owners since 3.29s only require a diff upgrade. For HD owners to get 3.29s they have to take their side cover off and swap the chain/sprockets.

Thanks I'll have to look into it. I'm thinking of maybe building the trans first. From the readings it seems the higher mileage trans have a pretty good amount of potential problems that I'd like to eliminate to the best of my ability.

Now I've never built an automatic transmission before, only reallly worked on the manual trans in my talon. Is this trans a pain to work on? Any advice?

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