Just took the truck on a 300 mile drive..150 of which we towed a trailer..did great now it won't shift into third. Could the transmission control unit have gone bad? Is that likely on a Jasper tranny?
It could be the module, but you should not just start replacing things without a proper diagnosis. You need to scan the computer for error codes, if no codes exist the problem is likely mechanical and you will have to do further tests on the hydraulic s and transmission electronincs. This is beyond the scope of drive way repair and you may be better having it towed to a local shop.
SOURCE: 1994 F350 transmission intermittent problem
I had the same problem in my 96 f-350. The transmission has slipped recording a slip code in the transmission. You can pull the codes and get it. I shifts into a safe mode that increases the pressure inside your transmission as part od a fail safe. Plain and simple, you have to have the tranny rebuilt.
SOURCE: 97 Ford F250 no towing power
I would say to check the timing it may be retarded which would lessen the power. also you didnt say if it miss fires there could be a number of causes for the lack of power.
SOURCE: Transmission service
I have a 99 F150 with 92,500 mi. on it and I have never had mine done and I tow lots of things. The key to transmission fluid and filter change is, if the trans shifts bad or does not pull the same then change it before you do any more troubleshooting, if you change it and still have problems then additional troubleshooting will be necessary. If you want to service your trans for peace of mind then change the fluid and filter, make sure that the level is full and correct. $150 dollars for an oil change on a light duty pickup is a little pricy.
SOURCE: tow/haul light comes on gauge shows HOT
Does the trans fluid have a burnt smell and is it brown or dark brown as opposed to a red wine color? If this is the case then you may have a service issue caused by a clogged trans filter which is what this sounds a great deal like and the sooner you get the truck to the dealer or your mechanic the better as the trans in these are not cheap to rebuild or replace.
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Hi Laura Garcia Johnson, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box? transmission designation? c6 or e4od or e4ode ?
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