Search results for query: HMMWV clutch fan

Thinking of the 4x2 HMMWV rod project concept and working back from a 41 inch rear tires, with 410 gear, at 70 mph I would need 2350 rpm. Allison 545 does not have an overdrive, but does have 4 gears. A gas 350 chevy seems a better fit than diesel at cross country cruise speed 2350 tranny...

Gotcha, thanks! How about a rebuild kit for the stock version? Mine operates fine, it just needs the ring at the end of the plunger replaced. It leaks pretty severely when the engine controls are switched off. I took it apart to lube it like other threads have said to do. I found the ring...

Nope totally different. HMMWV is hydraulic and FMTV is air

I don't think so. One is air and the other is hydraulic.

Does anyone know if a fan clutch solenoid from a HMMWV will work for LMTV/FMTV's? I know there'll be some wiring and air line plumbing issues but I just want to know if it can work. Thanks!

No, go back in this thread and it gives the shift sequence. Going from 2 to 3 the converter is unlocked. Then the converter locks while in 3 and is locked when going from 3 to 4. That puts a lot of strain on the 4th clutch pack that could be avoided. The parts I reference are high...

The transmission is supposed to unlock between 3rd and 4th gear. And thank you for the 4L80E mention. That's a pretty common transmission outside HMMWV applications, I think, so it shouldn't be hard to get those parts!

Fantastic info! Thanks so much.

I just posted this on the G503 site and thought it might be a fitting addition to SS for all those New-to-Me HMMWV owners. This is one of the circuits in the HMMWV that is probably the most misunderstad because it works backwards from what your common sense tells you. The gold colored valve is...

Do you have any idea where I can get parts? The check sensors light started blinking after I unplugged and cleaned the 2 relays in the evaporator. I can’t find any place to get parts I put my model # in online and nothing comes up. Sent from my iPhone using Tapatalk

My guess would be that either one of the switches or the wiring is having some type of issue. It's not a complicated system, if it's working correctly then: The manual I linked earlier has a troubleshooting section that, while it isn't specific for the HMMWV, it does cover the basics. Go to...

Does the fan attach to the front? Any more pictures? What year model of Caddy?

This is a thermostatic clutch out of an old Cadillac that I adapted to the HMMWV pulley. I cut off the 4 tabs on the front of the pulley and then put a 1" piece of 1/2" conduit into the center to co-locate the 2 pieces. It eliminates the fan clutch nuisance.

Welcome! And you have a pretty rare truck in an M36A3! I think you should start another topic and post pics :cool: The locking transmissions eliminate losses between the engine and transmission through the fluid coupling (torque converter) in 3rd and 4th gear, increasing fuel efficiency. In...

Both are approximately a 10w viscosity with different additive packages. Power stg fluid has anti foam additives and ATF has additives suitable for internal transmission clutches, valves, etc. A little mixing of both won't be the end of the world. Different topic, but 5 ton's routinely have...

Thank you again. Do you use Teflon tape on the Cadillac valve connections I’m going to change it tomm? I see nothing happen on a cold start disconnecting the solenoid plug Sent from my iPhone using Tapatalk

I got to say "The 2X4 in the fan test is just plain crazy" said that and another word that can't be written LOL. That's why I painted a stripe to clearly see crutch action. Once one gets a feel for the goings on (proper operation) with the system it will make more sense between lock up and...

I replaced my fan drive switch and time delay and fan still runs at all times. Only thing left is Cadillac valve or fan clutch. I’m at wits end lol Sent from my iPhone using Tapatalk

I read many fan issues lately ,actually all the time. Lots of surplus sales, so Guys... I would like to ask, Did you just get this truck? (I see the low post counter) The cooling system is simple auto shop 101 like any V-8 engine. So now who's big idea was it with the wacky HumV fan control...

search is your friend https://www.steelsoldiers.com/search/582468/?q=HMMWV+clutch+fan&o=date