6.2 diesel 700r4 to NV4500

[Subourbon]

Hey folks,

The 700r4 annoys me. And inha e the parts to put a turbo in my 6.2 and ya, it won't make it a power house, thats not my goal here. But with more control of what gear im in, I can maximise the torque band I want. Anyways,

Its a 4x4 woth NP208 tcase with passenger side drop.

I've researched this a bunch already. Theres a nice YouTube series of a guy doing close to the same thing, (he swapped a NV4500 in from a Th400). Broke it down really nicely with what steps are needed etc.etc... bit then before he even goes for a drive his last video, he sells the truck. Disappointing. Anyways. Seeing someone physically do the sane-ish steps was helpful.


He didn't have have to lengthen nor shorten the driveshafts. So first question, if anyone's done this before is, would I need to lengthen or shorten the driveshafts?


Also, the clutch pedal assembly. That plate that goes underneath the steering wheel/column with the brake and clutch pedals. I've looked around on ebay. Not cheap those things.

Are there any after market clutch pedals that work, and can do the same thing? Should I go for those or am I better off getting the GM original part

Im not quite there yet. Still need to source a nv4500. Rare pieces those things. Then I know kw ill need a 6.5 flywheel m, clutch, adapter housing and drill out holes for master cylinder etc...

However, if anyone's done this build or similar one before im definitely open to hearing your stories and feedback dos and don'ts..
Cheers all, thanks

 

[Rustisbest]

Not in a squarebody but I went from a 4L60E (should be same dimensions as 700r) to an NV4500. All I did was change the input on the NP241 to 32 spline. Driveshafts stayed the same

 

[Subourbon]

I've thought about doing a 4l80e swap for a tougher auto trans. Theyre way more popular thats for sure, theres some all over. But theres also a bit more screwing around TCM TPS to talknto the injection pump , I know ill need to change the driveshaft lengths. Also the t case input spline. Theres work arounds to that I know that. Im nist wondering what would be more fun and tough in the long run.

Yeah, I mean they're slip jokes, so you do have a bit of play. And I would rather maximum contact between all splines to avoid any breakage. But thats good to know.
Oh so id still need to change ge the splines on the tcase?

 

[Rustisbest]

Yep, the NV4500 is 32 spline and the 700r4 is 27

 

[Subourbon]

Ah, ok, so ill need to crack open the np208. I found d a thread woth the part number needed for the tcase.

Some reason, the ZF5s are cheaper and more common than nv4500 in my area. I wonder how hard it is to make a gm talk to a ford tranny...
The zf5s and 6s are definitely tough gearboxes too.

 

[Subourbon]

Some reason, the ZF5s are cheaper and more common than nv4500 in my area. I wonder how hard it is to make a gm talk to a ford tranny...
The zf5s and 6s are definitely tough gearboxes too.

Yeah nope. All custom work. Like hand made, measured, spec'ed out... Fudge that! Lol