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Yes they are "aftermarket" but I have beat on them with over 450HP and I have only been able to kill them with 3 digit speeds. I believe your M1123 has 12K so you only have OEM sources for them. AS it turns out this is a very timely series of posts, and NO GOOD DEED GOES UNPUNISHED... I was just...

Holy Moly, they are cheaper by far, and you are correct they only have the rear ones in stock but can order the others, buy 2 and the shipping is free! that would be 2 shafts for the price of 1 at Autozone. I would be willing to bet they are from the same manufacture. They list the one for the...

I run the Detroit without bead locks and have never had an issue, I have been rather conservitive when airing down for the beach staying at 18 psi min.

Those are good numbers, look up 1995, Hummer, H1

I measure the 7K at 1.088", they would not be 12K unless someone other than the military did a ton of work replacing all the gear hubs, so not likely. The 7K shafts are not considered rebuildable. and even the 10K shafts which if you catch them early enough are, are not worth the effort given...

If they are original they are 7K, if they have been replaced they are likely 10K. Give me a minuet and I will measure some 7K shafts, you can tell by the dia. of the shaft.

Yes they still have them at $135 ea. they had them listed for $75 ea with a purchase of wheels but now they are $135 even with wheels, will not buy them anymore, they used to be reasonable.

Bravo! half the price of Trailworthy fab bead locks!

You need to get it moved off of the incline before you go crawling under it and disconnect anything, one of our members figured that out the hard way just recently, if it was running and driving before the batteries went dead and it was transported on a flatbed it is very doubtful it is anything...

Are you kidding me? have you ever tried to push over a palm tree?? I have one that died in the freeze two years ago that was only about 8 feet tall, even after a year I could not push it over with my JD backhoe, I had to dig it out.

Does the engine "rev" or can you feel it "load up" you should be able to feel the difference, Also how much of an incline? if the tranny is low on fluid it may make a difference. Probably the best is to find something to try and pull it. I have never had the parking brake set so tight that I...

I am sorry, I blew right past the thread title, the 89 M998 would be an A0, geez how did I miss that.

What model is your truck? if it is an A0 or an A1 you can get them so cheap at Autozone that rebuilding them is far less economical than if your truck is an A2. And they have a lifetime warrantee. Good advice on the TM, it will give you the information you need. With some possible exceptions if...

The GEP is a much better engine than the original Detroit, much less likely a cracked block or head. Question, does it bubble up through the reservoir when cold? if so and I was convinced it was a head gasket I would remove the rockers on each side and pressure up each cylinder and see if I...

Pretty cool, only you need a vacuum source, a little cheaper on fleabay and you may not be financing the destruction of the USA

The 700R4 I was building before I decided to go 6L80 had pressure switches on 3rd and 4th gear so it would lock up in 3rd and 4th

All transmissions (that we would be talking about) are 12V even the 4L80 they put in the HMMWV, They should have given you a schematic, all you have to do is wire 12V through the pressure switch to the lockup solenoid, unless they did that for you inside the transmission, again they should have...

Have the transmission built with a 4th gear pressure switch in the valve body, then just wire up the torque converter solenoid to that switch, it will only go into lockup in 4th gear, nothing else needs to be switched, this can also be done after the transmission is built all you have to do is...

Others have done this conversion someone will speak up I'm sure.

There are two available one part number Z135 and one Z136, IIRC the Z135 has a smaller bolt hole circle, but more research would be needed...