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limited info generic answer notify Winnebago Industries they own sunnybrook now --rv dealer--rv shop --rv forums some have service & owner manuals or order a universal one
How many miles have you done? Is the trans correctly filled with oil? Why do you think its slipping, when it changes up is there some delay in forward pull from the engine that gives similar symptoms to clutch slip? Its not that old and a well maintained trans that hasn't done much towing should do 150k without problems. Towing heavy trailers kills auto trans.
it can, in fact newer cars do it even more.. .saves fuel....
if fact new cars have fast 1 to 4 gear jump, (no load) MPG feature.
what is it doing and when, and under what loads?????
do you mean downshifting too soon?
OD is top gear. and TCC is torque converter lockup
down shifting happens 3 ways
1: you do it. shifter.
2: low vacuum this is the Load sense, hills cause low vacuum and it down shifts.
3: TV, this is throttle valve , sensed, you stab throttle to pass.
aka; detent, TV. passing gear.
on some cars there is an OD switch to cut out OD, say pulling trailer
pulling any heavy load, may case the OD to hunt, or the TCC to hunt
and is a real pain....
btw the FSM covers all 100 A/T issues, up shifts, down, slips. flare, early ,late. ... its complex device, tend to not own them.
if you mean your automatic trans is over heating when towing a trailer, when towing any amount you should have a trans cooler installed, the normal one in you radiator doesn't cut it when towing, also when towing if you are towing a heavy load do not do it in overdrive....it will over heat trans cooler or not
Excessive wear on clutches is usually from alot of heavy hauling, pulling heavy trailers. 40,000 miles is real excessive. If you can, I would take the access cover off the bottom of the bell housing and check to see if the pressure plate bolts aren't backing out. When the clutch was replaced they should have (or I would have ) used a thread lock on these bolts. There is always a lot of vibration in this area, and I have seen these bolts back out, on manual and automatic transmissions.
sorry to say this trans has to be removed and rebuilt seems like od clutches burnt out-do you tow heavy trailer with truck as you have to tow with od off(push button on shifter)
Take the plug apart (small set screw on the side) and make sure one of the wires hasn't popped out. Take out the screw and slide off the cover to see.
You will need a mini screwdriver to re-tighten the brass terminal if its the case.
Have you tested this with a test lite?
Good luck.....
1. Oil coming from the ext. vent means Overfill fluid transmission or valve body problem (need to open the transmission to overhaul it) but usually overfill.
2. Do you have any transmission faulty code
3. If you pull a trailer, heavy load there is a function in PCM (powertrain control Module) that raise the pressure to compensate the slip at clutch pressure and if you unhook the trailer and go on the highway before the PCM learn it, it will shift hard. What GM call the "shift adapt". You probably have a 4L80E for transmission or the 4L60E depends on the truck's options.
hope it helps.
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