93 6.5 Diesel K2500 Diesel - what transmission

[Slicer89]

I have a 1993 GMC Sierra K2500 with the 6.5 Turbo Diesel, It has a 5 speed manual transmission - And I am wondering what one it has, or how I can tell which one it has. My current one has 301k+ on it and it is starting to fail (popping out of 1st gear, 3rd gear is making a popping noise, whining) I've checked my fluid level and it's fine, Changed it, No change.

 

[Supercharged111]

NV4500.

 

[Slicer89]

NV4500.

That's what I thought - Jeez these things are hard to find...

 

[skylark]

That's what I thought - Jeez these things are hard to find...

Especially the 93-95 version.

 

[Slicer89]

Especially the 93-95 version.

Is there a difference between the 96+?

 

[skylark]

Lower 1st gear and there was something different with the slave cylinder. I believe that one is internal and the other is external. I believe that there was an issue with using the wrong tranny withe the bell housing.

 

[someotherguy]

Yeah, 1993-1994 are the 6.34:1 1st and reverse, 1995-up are 5.61:1 - and apparently, something I did not know, 1991-1992 are 6.32:1 1st/reverse, no idea why, but whatever.

1991-1994 has the old style case and bellhousing with the traditional external slave cylinder and ball/fork arrangement for the release bearing.

1995(?)-up has a slightly different case that holds a different front input shaft bearing retainer, with mounting for the integrated style slave cylinder and release bearing, which also of course requires a totally different bellhousing.

The (?) is I'm not 100% sure 1995 has this setup, but I do know 1996-up does.

Richard

 

[skylark]

Yeah, my memory was a bit murky too.

 

[burnhedge]

I pulled one out of a 95 awhile back to swap into my 88. It had the older style external slave but doesn't seem to have the lower geared 1st that my 92 has.

 

[someotherguy]

I pulled one out of a 95 awhile back to swap into my 88. It had the older style external slave but doesn't seem to have the lower geared 1st that my 92 has.

Thanks for responding; I was pretty sure 1995 still had the older case but new gearset - had read that numerous places - but without having seen one in person I didn't want to say for sure.

Richard