Quote:
Originally Posted by graffici
On my 89 F350 the pcm is located behind the cover next to parking brake pedal. It has a bolt holding the plug into it under the hood. I am having the same problem with my e4od it starts out in od or 3rd in drive and can shift it to 2nd manually in 1st or 2nd on shifter. Just had it in the shop for diagnostics all electronics checked out and they told me it is something internally in the tranny,they say forward clutches possibly.
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I found my PCM, on the vans it's under the blower motor on the pass. side.
Pull your pan and take a look out the solenoid pack. Mine had metal powder on top which shorted it out and burned the circuit board. Ultimate failure on mine was the front seal blew out, probably from the converter getting hot trying to drive in only second and third. The seal actually worked it's way about half out of the front pump. The EPC solenoid is on that pack as well, it's the pressure control solenoid and when it fails the trans builds max pressure from what I can tell. Pump working extra hard, converter working extra hard, all of that causes a lot of heat. I'd pull the codes on my own to confirm since having 2, 3 and R sounds more like no power to the tranny or a burnt solenoid pack than bad forward clutches. I mean how bad can the forward clutches be if your truck will start off in 2 or 3?
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1986 F350 Crew Cab 2wd SRW. 1991 7.3 IDI, T-19 4spd Sterling 10.25 3.55, 12" HD clutch. A Banks waste gated turbo. 5" cut down Peterbilt stack. Midwest rebuilt IP turned up. AC Delco 6.5 GM 12V GP's, working great. Running W85 high performance zero-gel diesel! D60 front conversion, 4wd conversion, dually conversion, and steel flatbed conversion now underway. Man those frame rivets are a pain!
1966 Porsche 911. 1983 911 SC engine with modified Zenith carbs, headers, 911S brakes, custom fuel rails, MSD 6al box with timing computer, 1974 IROC body kit. 1850lbs, 200rwhp, total blast to drive.
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