Need Advice - No Reverse - 1999 4.0L SOHC

[bobflood]

Thought I would post this here in the Transmission forum also - Primarily use the 2nd Gen Stock forum.

Need some advice. Our Car Care ministry has had a 1999 XLT 4.0L SOHC, 2WD, with about 168K miles donated to us. (We accept donor cars, inspect them, make repairs to make them safe and reliable, then give them away.) Donor says it runs fine except that it won't move in reverse. I'll pick it up Wednesday; plan to drive it about 30 miles to our facility.

From research here, I think I understand how to test for the low/reverse band being broken - get up to 25 MPH or so and let off gas; if it's the band there will be no engine braking and rpm's will drop quickly. I think I understand that repairing that band requires removing and disassembling the transmission - is that right?

If there is engine braking, what else could be the problem?? Are there repairs that could be made without removing the transmission? Valve bodies? Servos? A little advice from the experts on this forum would be greatly appreciated.

Thanks in advance for your help.

 

[JK080]

To test for the low band operation by using engine braking select manual low, accelerate in manual low and let off the gas, if the vehicle just will coast and the rpms return to near idle then this would be a indication the low band is not functioning. Before removing the the transmission is may be worth it to remove the pan and the reverse servo cover, this will allow you to inspect the servo piston and may be able to conform a broken band.

To replace the low-reverse band the transmission will have to be removed and be completely disassembled as it is in the bottom of the case.

 

[bobflood]

James - thanks for the info. I'll be picking up vehicle Wednesday and will test it then.

What could it be besides the low/reverse band??