Search results

Unless you absolutely need to get away from electronic controls, I think what you are describing would be a good candidate for a 4L80E swap instead of a GV overdrive. The nice thing about the GV unit is that you can manually control everything and retain the non electronic TH400. All of that has...

I think the OP was not taking into consideration a very sloppy TH400 torque converter when doing RPM calculations. It's a non-lockup so you will probably add 300 ish rpm's to your equation.

Sounds like a sticky hub or something adding drag/acceleration to a front wheel. Remember you have an LSD for a front diff. When I drive mine hubs locked in 2HI it does have lots of steering wheel feedback.

Forget the gaskets, with a drain plug for easy service I would use a quality RTV. Seems like no matter what gasket you use, it will always drip or wick out somewhere. With RTV after it dries, you could pull the bolts out and it will still stay on leak free. It just makes a time consuming mess if...

I don't know how there can be naysayers when this stuff happens??? It's a much needed upgrade. Even though you were stuck on the side of the road, you are very lucky something more catastrophic did not happen.

Keep on truckin'

I personally like the 91' K30 4x4...what is considered to be the unicorn of fourwheel drive Chevy trucks. 4L80E transmission mated to an NP205...yes please!

Won't matter what color it is when one of those 10-bolt cross shafts blows through it... :) I'd go with black so it doesn't stand out. Nice looking rig!

Sounds like the direct/reverse clutch is failing. I would service the fluid and filter, pay very close attention to the level adjustment. If that doesn't solve it, you will have to tear down and rebuild it. I'm not too familiar with rebuilding a TH400 but you could invest in a pressure gauge...

Anyone using HMMWV take-outs or crate engines you see scattered on Ebay? Seems like you can find one for around $1200 every time I log on.

Do not forget with the age of these vehicles that a majority of the time someone has hacked something together. I doubt the military would or someone that has purchased one and kept it original. Usually when people post up of "I had my local mechanic fix this..." it means the truck had some...

Never knew the 700R4 was an option on the 3/4 ton model. Always thought they got the TH400 until 91' when that was the only year for a 4L80E in the straight axle body style. Keep a build thread...that's a nice rig!

I think you may have a TH400 and not a 700R4 too.

Nice workhorse...I'm jealous

Yup...looks like another CUCV Who cares what it is, RUN IT! Post up a photo of the interior dash and under the hood so we can see if it looks stock or cannibalized.

The NP208 has an oil pump driven off the rear output. As long as your fluid is full and in good shape, it shouldn't matter how long you pull it in neutral as it is being lubricated exactly like normal driving. It's the tcases that rely on splash lubrication you must be careful with. That...

I'm uncertain what you are looking for? Are you unsure if it's a CUCV or a specific model? If you are trying to buy parts it is pretty much an 84' K30 diesel except for the starting and charging sustem.

Sluggish off the line indicates a slipping stator inside the converter which will require a rebuild or a replacement. Especially if the trans works fine at higher rpms.

Take the seal out, clean it up really good with brake clean, and install a new one with a nice application of RTV...call it good. Those extension housings are fairly plentiful, I would be surprised if you couldn't find one for free.

This subject has been beaten to death but here we are once again...everyone says that it works and that the alternator has a tach lead or the STE/ICE has a port for a tach signal but no one ACTUALLY has a thread about the installation and successful operation of the M998 tach on a CUCV. I have...