The Stovebolt Site Forums The Shop Area Engine Shop transmission specs... future tech tip???

Ok, I know some of this information is on the site in a lot of places, but wouldn't it be nice if it was just in one?

What I am asking... you got a transmission pulled and are replacing it for another? Take some measurements and/ or pictures and send em in.

Some useful information would be...
*Transmision type... 3 sp, 4 sp, auto, etc
*What it was found in
*case dimensions... height, length, width, weight...
*length of input shaft
*spline count of input shaft
*diameter of front bearing retainer
*spline count and diameter of output shaft
*pto yes/no
*distance from front of transmission to center of shifter
*gear ratios
*length of front bearing retainer
*mounting bolt pattern
*etc

You got the transmission out at the side of the barn... measure it! The physical dimensions are what is most critical in a transmission swap.

I know what your thinking... the T-5 hybrid is the best choice transmission, so this is just a waiste of time. Well, we might be able to come up with a transmission swap that goes in a little bit eazier than that T-5. At the very least solve some of those pesky clearence issues on that swap.

Personally, I want to use a NV4500 in my swap as they are bulletproof, but don't want to spend all the money on one to find IT DON'T WORK!

So please start sending in some measurements, some Stovebolters will thank you for it

The NV4500 or New Venture Gear 4500 is a heavy-duty, manual shift, five-speed overdrive, longitudinally positioned transmission.

History
New Venture gear was the somewhat unlikely merging of the two manual shift design & manufacturing divisions of General Motors and Chrysler Corp. The Muncie (or Stewart Muncie) division of GM and the New Process division of Chrysler became New Venture and one of the first fruits of this union was the NV4500.

The NV4500 was first released in Chevy / GM trucks from 1993 and then into Dodge trucks in 1995. Though it has it roots as the New Process 4500 four-speed beginning as early as 1972 in Dodge trucks, its current incarnation as we know it today is quite different.
Identification
The NV 4500 is a top loading five-speed transmission with a cast iron case, aluminum top cover and dual PTO ports. It features all helical gears, and is fully synchronized. The NV4500 has a case length of 12.37" and an extension housing length of 6.5". This housing contains fifth gear. As usual, 2wd style housings are longer.

A unique feature of the NV4500 is its fly-weighted 1st-to-2nd gear synchro assembly, preventing a downshift at excessive revs. Its unique synchro ring composition requires a special synthetic lubricant.

Transfer Case Adaptability
The Chevrolet / GM 4wd version of the NV4500 can be adapted to the Jeep:

Dana 300, 1980-1986
Adaptability to the NP231 transfer case can be acheived when using a Dodge 4wd style tailhousing. However, a change of mainshaft or transfer case input shaft will often be required due to spline count.

Engine Compatibility and Adaptability
The NV4500 is found in GMC & Dodge trucks. The bellhousing pattern for 1993-1994 GM versions is unique from the later (1995-) GM and Dodge units. The 1993 and 1994 Chevy versions have a lower first gear of 6.34:1 and an unsynchronized reverse gear. Transmissions after this period have a higher 5.61 low ratio and reverse gear synchronization.

Input shafts for the GM and Dodge units have 10 splines with 1-1/8" diameter. GM shafts stick out their usual 6-5/8" while the Dodge units are 7-5/8" long.

Make: New Venture Gear
Length: 18.9"
Weight: 195 lbs.
Case: Cast Iron
Top Cover: Aluminum
PTO Ports: Both Sides
Gearing: 6.34, 3.44, 1.71, 1, .73, R 6.34 or,
5.61, 3.04, 1.67, 1, .74, R 5.61


* Just a note... only the 1994-1997 Dodge 2wd version of this transmission has provisions for a mechanical speedometer. The tailhousing of this version is 13 inches long.

**Avoid the HD version that came with the V-10s or Diesels... these have an input shaft that is 10 spline 1 1/4 diameter

This might take a while! Don't be shy there are no wrong answers... just a few measurements of that old trans sitting out back or under the workbench. Physical dimensions are most critical. We can fill in the rest of the specs as more info comes in. I don't care if it is Ford, Dodge, Chevy... etc.

I know there's a lot of info torards going to an auto, so maybe we could focus on Manual transmissions.

Thanks
John

P.S. I am off of work for a bit, SO I HAVE TIME!