The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > All 4x4 Tech & Off Roading

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-29-2011, 09:29 PM   #1
DirtyLarry
Windy Corner of a Dirty Street
 
DirtyLarry's Avatar
 
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,903
NV4500 experts: Shift tower question

Some of you may remember my NV4500 swap posts from a few months ago and may also remember I was chasing some noises afterwards. The big noise was fixed by replacing the output gear on the NP205 tcase while there was still a lot of noise left over. In the end, I had enough of the noise and got a brand new NV4500 replacement trans. Not a reman…but a brand new one. All is great now and this sucker is quiter than my ZF S6-650 in my HD truck as well as the SM465 that was removed months ago.

Original thread on the NV4500 swap

The question is the first NV4500 had a shift tower with a short stub (left) shaft while the new one, which is supposed to be the same year of trans has a long one (right). I first ran the long shift tower with the new trans but hated the lever location and overall height but noticed if I put the long tower on the old trans the trans would not shift. Just bind up. On the other hand, if I put the short tower on the new trans it seems to shift just fine with shorter gates with a much better shift lever location.

Anybody know what the difference is between the two towers? Both are supposed to be for a ’98 GM K3500. Anybody know if there is any danger in me running the short tower on a trans set up for the long one? Again, the short tower works in both transmissions but the long one only works in the new trans.



DirtyLarry is offline   Reply With Quote
Old 05-30-2011, 01:55 AM   #2
thirdstreettito
Resident of Here
 
thirdstreettito's Avatar
 
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,713
Re: NV4500 experts: Shift tower question

Did both of the K3500's have the same engine? The same GVWR? ANY difference in the drivetrain or suspensions? ANYTHING at all? Were they both the same cab design?

A 97 has the shift tower integrated into the shift cover and the shifter if bent above the floor and has wide shift spacing (physical position of the shifter not gearing).

A 98 style has a seperate shift tower that bolts to the shift cover, the lower section has the bend in this design and the shifter looks straight above the floor, and this style has a closer/tighter shift pattern.
__________________
~Bradley~
2004 Black GTO LS2/T56 too much to list

Miss having a truck

Last edited by thirdstreettito; 05-30-2011 at 01:57 AM.
thirdstreettito is offline   Reply With Quote
Old 05-30-2011, 11:34 AM   #3
snj8198
Registered User
 
snj8198's Avatar
 
Join Date: Feb 2007
Location: Star Valley, WY
Posts: 1,990
Re: NV4500 experts: Shift tower question

http://nv4500transmissions.com/parts...p-assembly.htm

http://quad4x4.com/NV4500_Parts.html#Stubs

Check these out Larry.
__________________
Steve
1971 GMC Longbox. Full Roller Stroker 489 w/ FiTech EFI, Chris Straub Cam/NV4500/205/D60/14B w. Grizzly Locker and 4.11's. 2" Lift on 33's
snj8198 is offline   Reply With Quote
Old 05-30-2011, 12:01 PM   #4
DirtyLarry
Windy Corner of a Dirty Street
 
DirtyLarry's Avatar
 
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,903
Re: NV4500 experts: Shift tower question

Who knows. The used one I installed in December supposedly came from a ’98 K3500 with a 7.4L. The new I recently got from a supplier in Texas only listed it as a ’98 K3500. No mention of engine, cab configurations or anything.

In doing some research I think the first trans I got (the used one) was actually a ’95ish with the shorter tower lever but a slightly taller cover. I didn’t even notice a difference between the two covers when they were sitting on the floor. Looking at quad4x4’s page it looks like the short one shift tower is still the direct replacement for the later style with the taller cover so I should be good. The short one (better shifting one with the better lever location) works in the new transmission just fine. It is just odd that the long one causes the old trans to lock up completely where it can’t be shifted. Odd.
DirtyLarry is offline   Reply With Quote
Old 09-22-2017, 08:34 PM   #5
foamypirate
Registered User
 
foamypirate's Avatar
 
Join Date: Apr 2009
Location: Pflugerville, TX
Posts: 594
Re: NV4500 experts: Shift tower question

I realize this is an old thread, but felt I had some information to contribute for those who may be looking for more NV4500 information. From my understanding, the taller shift tower is from an 01+ NV4500, to accomodate RPO HVY - 2" Body Raise: HD Model. The taller shift tower was to raise the shifter up to match.

EDIT: Of course, right after I post, I find Larry's thread from 2015 detailing the same thing. None-the-less, I'll leave it here in case folks stumble across this one instead.

From https://core-shifters.com/pages/new-...gear-id#NV4500:

Quote:
Be aware though that for GM models of NV4500 there are two different lids - lid casting # 25137 for 1995-2000 and lid casting # 33893 for 2001-2007. The base mount for this later lid is 1/4" higher than earlier lid, requiring a deeper stub - i.e. each model requires a different shifter base. There is also risk of this taller lid being found on rebuilt Dodge units, meaning the original shifter base will not be compatible - so best to check the lid casting number (near front center of lid) when buying a shifter for any NV4500.



If you have an aftermarket lid with no numbers, it is almost certainly the shorter lid used by Dodge & early GM. We are reluctant to discuss stub depth here as it is hard to measure and easy to confuse but depth from flange face (w/ base gasket removed) to bottom of notch in rails would be ~ 1.75" for Dodge & early GM, 2.00" for late GM. This depth is best measured on the trans; to measure stub length on the base you must include the gasket to get the correct flange reference. Notice in the pic below the stock base housing remains the same for all years - only the stub length changes.


Last edited by foamypirate; 09-22-2017 at 09:00 PM.
foamypirate is offline   Reply With Quote
Old 09-22-2017, 09:58 PM   #6
DirtyLarry
Windy Corner of a Dirty Street
 
DirtyLarry's Avatar
 
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,903
Re: NV4500 experts: Shift tower question

Quote:
Originally Posted by foamypirate View Post
I realize this is an old thread, but felt I had some information to contribute for those who may be looking for more NV4500 information. From my understanding, the taller shift tower is from an 01+ NV4500, to accomodate RPO HVY - 2" Body Raise: HD Model. The taller shift tower was to raise the shifter up to match.

EDIT: Of course, right after I post, I find Larry's thread from 2015 detailing the same thing. None-the-less, I'll leave it here in case folks stumble across this one instead.

From https://core-shifters.com/pages/new-...gear-id#NV4500:
Thats alright. We all make mistakes all the time. Getting out of bed this morning was my first
DirtyLarry is offline   Reply With Quote
Old 10-06-2017, 08:33 PM   #7
foamypirate
Registered User
 
foamypirate's Avatar
 
Join Date: Apr 2009
Location: Pflugerville, TX
Posts: 594
Re: NV4500 experts: Shift tower question

Quote:
Originally Posted by DirtyLarry View Post
Thats alright. We all make mistakes all the time. Getting out of bed this morning was my first
Hey Larry,

How did the shorter shift tower end up working for you with the later tall cover? No problems with it? I have an 05' NV4500 that's missing the shift tower, and trying to figure out which route to go.
foamypirate is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:33 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 1997-2013 67-72chevytrucks.com