NV4500 swap into 90' V2500 burb

[Broncoholics.com]

Okay gents, I'm getting ready to really step up my tow rig. The rig has a TBI350/TH400/NP241 as it sits and there isn't anything wrong with the tranny, but I really need some lower gearing since the 4.10s don't cut it with the 35s. I also just found a very good source for used NV4500s in good working order for $700 with no core charge. This is for either Dodge or GM cases when they have them. I have swapped a couple NV4500s into my CJ7, and another one into my Early Bronco, so I am very familar with the Dodge versions. Just not the GM versions.

The plan is to find a GM unit with bellhousing, bolt it to the 350, and bolt up the NP241 to it. The question I have is in regards to the spline count of my NP241 vs the GM NV4500. I think its a 32 spline, and I think that the GM NV4500 is the same. Can anyone confirm this? They should also share the same bolt pattern, correct?

So, all I would need is some 5.13s for the axles, a TBI350 flywheel, clutch kit, hydrolic clutch mechansism, and a clutch pedal assembly. I'm also pretty sure that the length of the setup may not even require new driveshafts. Anyone see an issue with this?

Scotty
www.broncoholics.com

 

[jwglover]

The Nv4500 and the 400 is the same length, so the drive shafts your drive shafts will be the same length, and the 241 (since in was behind the 400 ) is also the same splines, and same bolt pattern. It will slide right on to the tranny.
I did the same thing to my crewcab, works great !
Try to get a 97 -00 chevy tranny,, they have the internal slave cylinder on the clutch. I thought it made for a nicer set up .

 

[tRustyK5]

Internal slaves are a PITA. When it leaks, and it will, it'll be 10X the trouble to fix.

Rene

 

[ryan22re]

but honestly how often do they spring a leak? gives you an opportunity to inspect the clutch and rear main seal. maybe change the tranny and t case fluid.

ryan

 

[tRustyK5]

It's just tempting murphy's law IMO. Why not go with the earlier version with the external slave? Then if it does leak it's no big deal. I can check tranny fluid without dropping it from under the truck...and the clutch stuff should last damn near forever.


Rene

 

[u2slow]

FWIW...

One local tow-truck company (Mundy's actually) stopped buying stick-shift Chevs after their first batch of internal slave trucks. They weren't even getting 10,000km per clutch.

 

[tRustyK5]

Looks good on them Kevin...bunch of thievin bastids anyways!

Rene