saltonseadog

My 2.5 SMAX with the gray 3.3 tranny will not roll without engaging the tranny. Frontwards or backwards it's the same. I think it caused the engine to overheat, and may have burned it up. I had all three of my Maxxes running at once for a few minutes and the diff blew on one and the engine overheated real bad on this one. When others are driving your stuff, they don't know when things are going bad!

What do you guys think? Is it a tranny issue? I took the engine out, and it still won't roll either way.

beer=food

Yep tranny or bearings.Check ya diffs seperately first.
Rip it down, find it LOL, l agree others never can tell when things dont sound right while driving... and they always stack it pretty much straight up ! My zircon l let a pommy mate drive last summer, went about 30 metres before he took out a pole, LOL pine wooden post ! Ripped left wheel off !
Cucamuluca !
You might get lucky and find a rock or something stupid in there, wishfull thinking l know, but you never never know, just maybe your lucky day !

DriftingDragon

i had that problem with my di but loosening the diffs worked for me

RCCanuck

busted diff or busted tranny.....check your shifting rod to make sure its not stuck between gears

Buzz1

Check the clutch. Sounds like it's not disengaging.

RCCanuck

he took the engine out and it still own't roll....its not the clutch

saltonseadog

The shift rod is OK. The brake seemed a bit tight, but I don't think that was it. I have the tranny out now, but I had to go to work before I could get much done. I think I will go by the LHS and pick up some new shock towers and body posts and take out the diff. I still have the round posts on this truck and they are bent. I took the top off the engine, and it doesn't look trashed, but the compression seems a bit low. The top of the piston is fairly black, but doesn't look tortured.
I think I may call it a work day early and go home.

sunco1

well try and loosen up the brakes all the way and if it still does it.... idk

saltonseadog

Well, I took it apart, the diff is solid as a rock, working perfectly. I put it all bact together, and fired it up. It was ok after a new glow plug, but onlr ran a minute when it lost power to the wheels, revved up high and died.
Now ir rolls fine frontwards, but locks up immediatly backwards. If I switch it into reverse, it will roll backwards, but lock up if I try to push it forwards. I am no pro, but it seems like the tranny is busted.
Any advice?

charlieboy

I had that problem and it turned out to be a shredded rear wheel bearing, i had to take the diff case apart to replace.
It cout be almost any bearing or gear on the drive train, check also the brake adjustment !!

dewberryb

Check your brake. It may be a little tight in the nutral postion. When you apply the throttle it is grabbing.

saltonseadog

With the engine turned off, it can be pushed either forward or backwards, depending on the position of the shifting rod. If you push it the oposite way, it immediatly locks up HARD. No slack, tire dragging locked up. I think it is in the tranny. I have not had to go into a trans yet. This one is the gray two speed with reverse. Its the wife's truck and doesnt have that much time on it, but I guess something must have slipped inside.

jatoracing33

if it wont roll the opposite way it might be a one way bearing...these trannys have one

saltonseadog

I will tear into the tranny tonite if I have time. I hope its is simple, because I am.

tommythecat

My Feedback: (2)

It's gonna sound crazy, but saying it won't roll eaither way , after a blown out diff...I have to ask are you sure you didn't put one diff in upside down. To check, just lift the front off the truck off of the ground and push it with the back wheels down, if it rolls the rear wheels but the front ones turn the opposite direction, then you have a diff in upside-down.

saltonseadog

Did put a diff in wrong once, but this one is 2WD so throw that idea out!

tommythecat

My Feedback: (2)

Woops, my eyes read smaxx but my mind saw t-maxx. Sorry about that.

saltonseadog

Yes, its my only 2wd left. The wife wanted reverse. I will probly make it 4X4 next time I have the front apart.

saltonseadog

Well,it didn't take long to find the culpret. A bearing on the input shaft (I think its the input shaft) the shaft the spur gear assembly is on , froze up. Of course, that put "just a little stress" on some other parts. the screw pin holding the internal gear onto the shaft is bent, and the gear is ruined.
This tranny really had very little time on it, I am kind of suprised it failed so fast. Well, at least I have the brakes slipper, and linkage, so the cost won't be too high.
I may be able to salvage a good bearing or two out of it, but I guess the rest is junk.

Thanks for all your input folks.

jatoracing33

im guessing dirt or something got in it at some point in time. otherwise then id say just a fualty bearing

saltonseadog

A tiny bit inside, but not much. Just bad bearing, I suppose. I have ccleaned the gears up a bit, and smothed the case down where the bearing got hot and screwed it up, and I just might give it a try. I need some new bearings. I have a couple sitting on the bench, but they are used. I don't want to put a bad bearing in to replace bad bearing!
Fortunatly, I have trwo more Maxxes!