gutless

[retiredChemist]

Retarder not stuck on?

[BusFiend]

A quick Google search shows a remanufactured MT643 going for $1800. I can't believe labor would be more than an additional grand, probably less. Still not cheap though. A solid used 643 should be available around $700-800, I would think.

Good luck!

[gbstewart]

power lose,? check tranny fluid, I would replace the fuel filter, it sounds like your not making power, is there blue, white smoke out the pipe? are you letting it get to full temp before you are trying to move? my bus was sorta like that, wouldn't have enough power to pull up a hill, at times would blow out blue smoke every now and then, I replaced all 8 injectors, problem solved, lots of power now.
gbstewart

[EastCoastCB]

Originally Posted by BusFiend

A quick Google search shows a remanufactured MT643 going for $1800. I can't believe labor would be more than an additional grand, probably less. Still not cheap though. A solid used 643 should be available around $700-800, I would think.

Good luck!

Yep those prices sound about right.
I've seen nice low mile used units for around $750- some even include the retarder. If I ever have to replace mine I'll definitely add the retarder.

[Bungeekord]

yes smoking white at idle, need to replace fuel filters as pressure/vac gauge is showing significant strain on the diesel side.

i have both filters ready to go, the 1st one with the water settling bowl and the 2nd one with the built in cap that sits right on top of the engine. Any tips on how to replace these without letting air into the system/ how to prime them one installed?

haven't been letting it warm up to normal operating temps, good idea though. I know its a good thing to do for the engines sake, prob good for trans as well...

what is a retarder? and how do I know if its A. installed on this trans, and B. working or engaging?

thanks y'all.

[superdave]

search youtube lots of vids on the process

[cadillackid]

how steep is ther incline? if its really steep yes you will run the torque converter against the stall and not make enough torque to brong it over an oncline or an obstacle..

on old cars it used to be possible to "stall" an automatic car on asomething as small as a 6 inch curb.. as the incline of that curb was too much for the auto trans to overcome...

a very steep quick incline can stall an automatic and not have it be damaged or broken in any way... its how a torque converter works... if you can get any running start at all you have a shot at running it out of there.. esp if you keep it in '1' so it never attempts to shift...

-Christopher

[Bungeekord]

it was pretty steep, not sure the exact degree of the slope, but it was significant.

got it out today with a friends enormous 4x4 army truck. Once it was on flatish ground it crawled out of the yard and onto the street. parked it in a gravel lot to work on it.

The fuel filter on top of the engine has proven to be a nightmare to remove, all the plastic tabs broke when we laid a screwdriver across them to torque it. tried tapping it loose with a blunt socket extension and mallet, more plastic tabs broke off. Currently its just the inner plastic threaded ring remaining in the housing, we were able to dismantle most of the cap and pry the filter out, but now were stumped how to get the remaining plastic out without damaging the housing and metal threads. What a pain in the ass! judging by the brittleness of the plastic and the paint on the cap which matches the valve covers, were thinking this might be the original fuel filter?!? With 128,xxx on the engine I sure hope not, but it is seriously fused to the housing. Ugggg

[Bungeekord]

ok, whoops . . . sorry to post a frustrated mid-job freak out.

I got that fuel filter all out and cleaned the filter housing meticulously (used a shop vac actually). Also changed the other fuel filter, and got the oil changed. Its running a lot better now, engine wise. Its got more pep for sure.

Need to get temp plates to really test out the trans. Forgot to check fluid, will add to list for tomorrow.

[BusFiend]

Way to go with those filters!