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Since my 700R4 is going into a M1028 truck, your specific circumstances to install it into a HMMWV may and probably will be different. Having said that, the GM part number for the adapter between the 700R4 and NP208 is 14038663, which is taller than the OEM adapter used behind the TH400. Not...

I own a M1028 truck which has the TH400 3-speed transmission and 4.56 gears. Top speed around 50 mph, downright scary on the interstate, engine sounding like a Japanese motorcycle. A few months ago I made the decision to change-out the TH400 with a 4-speed transmission to pick-up a little extra...

This fixed my cooling issue -

Recovry, The price of the Bowtie K-case 700R4 with the Advance Adapters 32-spline output shaft was $1,990.00. The HD diesel torque converter added another $199, and the brake-switch lock-out kit was $45. Add another $60 for crating and $175 for LTL shipping from California to Kentucky, and the...

TOOK THE PLUNGE Today I ordered the Level 2 700R4 from Chris Gardner at Bowtie Overdrive. I just wanted to pass along to others on SS who may be considering this tranny swap how important it was (to me) to procure the 700R4 from somebody who also owns and drives a M1008. Chris knows exactly...

Hi Rich; I have always enjoyed your posts and appreciate your attention to detail. I am confident there are many CUCV owners on SS (including myself) who would like to convert their 6.2 over to a serpentine system, however the process is indeed a puzzle, and the magnitude of the puzzle seems...

Not wanting to hijack this thread, so I will simply say I documented my seat install beginning at post #168 of my rebuild thread. My apologies to the OP.

I just recently installed high-back HMMWV seats in my M1028. Love 'em.

Joe the previous posts could all describe a solution, however I believe the problem could be a dry gear shaft where the speedo cable attaches to the transfer case. Inside the transfer case there is a plastic "drive" gear around the output shaft which "drives" a plastic "driven" gear mounted in...

FULL CIRCLE. I have come full circle and decided to forget the 4L80E and stick with the 700R4. I apologize for any confusion and/or consternation my earlier post may have caused. My decision is final. I am purchasing a Level 2 700R4 K-case unit from Bowtie Overdrives in Hesperia, CA...

Ahem........... I have waffled back to the 700R4 again. I'll be keeping my parts.

Please post photos of your install. I also want to do this mod and would appreciate seeing your progress.

Thanks everyone for the clarification regarding the Park pawl. My next question is, were there differences in the 4L80E units as they were developed and put in service over the years? Is there a specific NSN I should be watchful for? Is there one better than the others?

I am looking to purchase a 4L80E to replace the TH400 in my M1028. I am not familiar with the timeline when the newer 4L80E units became available which had the Park pawl. I have found a source for a company purporting to have a quantity of HMMWV 4L80E units already rebuilt and ready to ship...

Here is the listed information on those 4L80E units. I would like to request help from someone familiar with this to make sure I am getting the correct unit with the Park pawl. Thanks in advance for the help. Remanufactured 4L80E Transmission for HMMWV Applications OEM Part Number 57K3570...

Well, yall want to hear something crazy? After months of thinking, pondering, wondering, and reading other SS members posts, I am now of the mind to forget the 700R4 and install a 4L80E instead. There is a company on a familiar auction site which purports to have a large quantity of military...

I kinda want that thang.

I could be wrong, but I believe the water pump location will not provide accurate temperature readings because the water will have just arrived from the radiator and therefore will be cooler than the water after traversing through the engine. If anyone knows this for sure please chime in. I am...

You should know that there are several different gears for the NP208, based on factors such as transmission, gear ratio, etc. I recommend you spend a few minutes to familiarize yourself with the different gears. The gear that is in the housing is called the Drive Gear. There is another gear...

Looking Good!