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CSGAS · 02-10-2013, 02:07 AM

This discussion may answer your question:
http://ls1tech.com/forums/13187274-post20.html
I take this as meaning the Dorman bushing is your best choice, I do not know if the LS7 pilot is extended. However, check below about the input shaft differences.

Also I may have to rethink my plans. One, I haven't been able to get my parts together as quickly as you did (btw, when I posted I hadn't looked at the forum group, I'm keeping an old Gen 1 engine with mine).

The trans you got has 3 or 4 shift rails instead of just one, right? That makes it a "5LM60" as opposed to the NV3500. Same internals though, and more importantly to you the input shaft is 5/8" shorter than the NV3500. If you have a pre-2001 engine, then the crank flange is intended to work with that shorter input shaft. If you have a 2002+ engine then the spacer and everything else is involved, or using a trans meant for the shorter crank. The flywheel mentioned in the link, which is supposed to be the one you originally read about, appears to be used to make the short crank 2001+ engines mate to the long input shaft NV3500s, then went out of service when that trans also did.

We haven't thought about what your engine came from, and that could simplify the pilot issue.

Also, the VSS output on your 91 trans should be 2000 ppm, which is supposed to work with the S10 speedo gauge conversion similar to the one shown here http://67-72chevytrucks.com/vboard/s...d.php?t=512751 except get it from a stick shift S-10 or similar.

Personally, I have to rethink what I'm going to do...it doesn't look like the parts are coming together in time for the week off I'll have, plus these are a couple issues that working around, will probably take more than a week unless I get lucky. We'll see!

02-10-2013, 02:07 AM	#8
CSGAS optomistic ah-so Join Date: Mar 2009 Location: Charlotte, NC Posts: 544	Re: NV3500/Getrag Reference thread!? This discussion may answer your question: http://ls1tech.com/forums/13187274-post20.html I take this as meaning the Dorman bushing is your best choice, I do not know if the LS7 pilot is extended. However, check below about the input shaft differences. Also I may have to rethink my plans. One, I haven't been able to get my parts together as quickly as you did (btw, when I posted I hadn't looked at the forum group, I'm keeping an old Gen 1 engine with mine). The trans you got has 3 or 4 shift rails instead of just one, right? That makes it a "5LM60" as opposed to the NV3500. Same internals though, and more importantly to you the input shaft is 5/8" shorter than the NV3500. If you have a pre-2001 engine, then the crank flange is intended to work with that shorter input shaft. If you have a 2002+ engine then the spacer and everything else is involved, or using a trans meant for the shorter crank. The flywheel mentioned in the link, which is supposed to be the one you originally read about, appears to be used to make the short crank 2001+ engines mate to the long input shaft NV3500s, then went out of service when that trans also did. We haven't thought about what your engine came from, and that could simplify the pilot issue. Also, the VSS output on your 91 trans should be 2000 ppm, which is supposed to work with the S10 speedo gauge conversion similar to the one shown here http://67-72chevytrucks.com/vboard/s...d.php?t=512751 except get it from a stick shift S-10 or similar. Personally, I have to rethink what I'm going to do...it doesn't look like the parts are coming together in time for the week off I'll have, plus these are a couple issues that working around, will probably take more than a week unless I get lucky. We'll see! __________________ Rubbing is Racin' Ribbing is Bench Racin' 1970 C-10 lwb Fleetside. Originally 350 2-bbl 3-on-the-tree, m/b, m/w, m/s no a/c. Currently running on a '76 Camaro 305.