tranny swap

NC4W · 04-06-2007, 07:16 AM

1988 k2500 with 350 and auto tranny. will a 5spd go in place of the auto without changing the transfer case?

75K30 · 04-06-2007, 09:45 AM

Which 5-speed are you planning on using? That B/W case will fit plenty of transmissions. The most common trans is the NV4500. A great strong 5-speed, that willl give you many miles of good use. These are getting popular, and will cost a few bucks, but worth it. Any change from autos to manuals may require driveshaft modifications. Manuals are usually shorter than most autos.

otrman · 04-15-2007, 08:10 PM

You will have to change t-case if you're current auto trans is a 700r4. The output shaft of that tranny is 27 spline, which makes the t-case input 27 splines as well. All most all manual trans are 32 spline output. You will need to find a t-case from a 2500 or 3500. I'm right in the middle of doing the same swap in a 1998 Chevy K2500. So if you need any additional info just ask.

04-06-2007, 07:16 AM	#1
NC4W Junior Member Join Date: Dec 2006 Posts: 7	tranny swap 1988 k2500 with 350 and auto tranny. will a 5spd go in place of the auto without changing the transfer case?

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04-06-2007, 09:45 AM	#2
75K30 Senior Member Join Date: Jul 2006 Posts: 2,507	Which 5-speed are you planning on using? That B/W case will fit plenty of transmissions. The most common trans is the NV4500. A great strong 5-speed, that willl give you many miles of good use. These are getting popular, and will cost a few bucks, but worth it. Any change from autos to manuals may require driveshaft modifications. Manuals are usually shorter than most autos.

04-15-2007, 08:10 PM	#3
otrman Senior Member Join Date: Apr 2006 Posts: 53	You will have to change t-case if you're current auto trans is a 700r4. The output shaft of that tranny is 27 spline, which makes the t-case input 27 splines as well. All most all manual trans are 32 spline output. You will need to find a t-case from a 2500 or 3500. I'm right in the middle of doing the same swap in a 1998 Chevy K2500. So if you need any additional info just ask.