C6 slipping i reverse
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Senior User
Joined: Oct 2004
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From: Fosen, Norway
C6 slipping in reverse
Had this truck just for a little time, I think it has a C6 trans, 3gear.
Today it started to slip in reverse, so I was wondering if the only cure was overhaul or if there is a adjustment I can do to make it work properly again?
Am I right if I say that reverse and first gear has the same clutch?
First gear is not slipping.
In my doorpost the trans is marked as TRANS K, AXLE C5.
Please give comments.
"Snubber"
Today it started to slip in reverse, so I was wondering if the only cure was overhaul or if there is a adjustment I can do to make it work properly again?
Am I right if I say that reverse and first gear has the same clutch?
First gear is not slipping.
In my doorpost the trans is marked as TRANS K, AXLE C5.
Please give comments.
"Snubber"
Last edited by snubber; Nov 22, 2004 at 02:13 PM.
Thread Starter
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Senior User
Joined: Oct 2004
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From: Fosen, Norway
Sorry about missing info, it is a 1989, 7,3 xlt lariat 4wd.
There is no overdrive, but a friend told me there could be a brakeband to adjust on this one for the reverse gear. He was not a 100 %, he said thar he could be mistaking on the C4 trans.
So I had just a little hope, stuff like this is expensive over here (Norway)
snubber
There is no overdrive, but a friend told me there could be a brakeband to adjust on this one for the reverse gear. He was not a 100 %, he said thar he could be mistaking on the C4 trans.
So I had just a little hope, stuff like this is expensive over here (Norway)
snubber
Senior User
Joined: Oct 2003
Posts: 409
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From: New York
i had a c6 in mine and ripped it out and put a zf 5 in the extra gears are great and id never go back. i also dont no much about the mechanics of these trannies excpet that they make great paper weights. although the oil running out tends to ruin the paperwork.
Elder User
Joined: Jun 2002
Posts: 519
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From: CT
I have a C-6 with similar issues been holding off on repairing it. Theres an overhaul video available for this transmission don't know if its available via the website or not. If I find the link I'll post it back on this thread.
Posting Guru
Joined: Jul 2003
Posts: 2,454
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From: Adams TN
check your fluid my buddy has one in a farm truck that leaks and we know its low when reverse is slipping . That is the first gear to slip for some reason. Also see if the fluid is burnt looking and smelling
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Mountain Pass
Joined: Jun 2004
Posts: 241
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From: Canada
Reverse uses these clutches. Reverse/High and Reverse/Low. This is Manual low. Do you have all 3 speeds fwd? If so the low/reverse clutch is bad. It is the first clutch pack put in the trans so a complete o/h is likely in order. D low uses a overrun clutch. You probably would not notice anything different in Drive first. Check fluid level and shift alignment. Don
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Elder User
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From: newfoundland canada
If i remember correctly(been a long time since i had a C6)there is a band adjustment that can be done from the side of the trans.Something like loosening a lock nut and adjusting a screw.Like i said its been a good 15 years since i had one,i have a great memory,its just short,lol.
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Joined: Apr 2004
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Originally Posted by redneckmechnic
i had a c6 in mine and ripped it out and put a zf 5 in the extra gears are great and id never go back.
Mountain Pass
Joined: Jun 2004
Posts: 241
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From: Canada
The band adjustment on a C6 is for second gear. Must be done correctly, with a torque wrench if one expects a long service life. The C6 is a very tough piece, but like any other clutch type planetary transmission must not be over heated. If the fluid gets too hot, bad things are sure to follow. Don
Elder User
Joined: Aug 2003
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From: newfoundland canada
Don,you rang my bell with that reply,now i remember,its the intermediate band that can be adjusted.loosen the adjusting screw 1&1/2 turns,hold the adjusting screw and tighten the locknut to 35-40 ft lbs(not sure on that torque but it does ring another bell,lol)Like i said before i have a good memory,its just short.
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