No High Range?

[buzzinhalfdozzen]

Just discovered the old man's M51 has no high range. We pulled the inspection cover on the top pass side of the case, shift fork is moving with the rod and it appears to have the proper amount of stroke (compared it to my M818 ).

When I searched, the only thread I found, the guy just replaced the case. Does anyone have experience with this problem? when you opened the T case what was broke? Or does something need adjusted? We were looking at the TM but seeing inside the case without splitting it is difficult.

If they are more threads related to this problem that didn't come up in my search please let me know. Many thanks in advance.

 

[buzzinhalfdozzen]

Forgot to mention that there's no grinding noise in high range when you let the clutch out.

 

[indy4x4fab]

Is the lever hitting the floor pan when you pull up on it in the cab?

 

[buzzinhalfdozzen]

No. We played around with the linkage just to make sure that wasn't the problem

 

[indy4x4fab]

Ok was just checking had that problem with an m813 not to long ago. I'm thinking with the age of the truck have you drained the t case to see if you get any sparklies out of it?

 

[buzzinhalfdozzen]

Tonights plan is to drain it. Will let you guys know what I find

 

[indy4x4fab]

I'm thinking missing teeth on the high side. We have a m52a2 at the museum with the same problem.

 

[buzzinhalfdozzen]

I'm keeping my fingers crossed.

 

[indy4x4fab]

I'm keeping my fingers crossed.

If you do end up needing a use t-case I have a good used one out of a m54 I'll let you have cheep, real cheap!!!! Heck I would trade u a t-case for anther tire like that last one you sent me.

 

[buzzinhalfdozzen]

Thanks! I still have one laying around. Does anyone sell internals? If it's only a bad gear or two I'd rather just swap them out.

 

[indy4x4fab]

Thanks! I still have one laying around. Does anyone sell internals? If it's only a bad gear or two I'd rather just swap them out.

I have seen most guys just swop t cases but if all you need is a couple of gears get with me and I will pull this one apart to get the gears for you.

 

[buzzinhalfdozzen]

Ok. I'll let you know what we find I we have to open it up

 

[buzzinhalfdozzen]

The old man tore it apart yesterday. 30 cent C-clip broke. Hopefully that's all it is (fingers crossed). Everything else looked good. Find out tonight for sure.

 

[M543A2]

Can you send photos of the broken c-clip, location, etc.?
Thanks Marti

 

[buzzinhalfdozzen]

See arrow in picture. It keeps the shaft from sliding back and forth. I was two minutes away from pulling that cover before we dropped the case. Could have saved a whole bunch of time.

 

[buzzinhalfdozzen]

Just to help any guys with this problem in the future diagnose it:

There were no chunks in the t case when we drained it
when truck was shifted into high range there was no noise at all, no grinding, no lugging, just acted like neutral.
Shifter and linkage and shift fork were all functioning normally.

Not sure if the 2.5 tons have the same design.

Hopefully we get to take on the first test drive in high range tonight.

 

[buzzinhalfdozzen]

Took it for its first ride. It has righ range now but it pops out when you shift. Its fine with just a little pressure holding up on the lever. Linkage is adjusted properly. Any ideas?

 

[rynomadman]

Omg thanks for this post you are going to save me lots of time and work. have been trying to figure out this problem for weeks now. was thinking it had to do with air. have this case in a mud truck that my buddy just got and could not figure how to get out of low. when everything else worked just fine.. so the c clip is right behind the cover plate on the back of the case? are those the only pic you had of it?

 

[jcappeljr]

I have a used 800 series transfer case for sale $200,It looks like a rebuild.

 

[buzzinhalfdozzen]

I didn't take more pics, sorry.

If you can't get yours to shift out of low you may have a different problem. I could shift into high but it just acted like nuetral.