Transmission Help

[greg s]

Hi, I have some questions regarding a problem with my transmission. I have 97 4wd sohc Explorer with the 5r55e transmission and 120,000 miles. I have read thru the numerous posts and have a few questions and problems. My main problem is reverse, sometimes when I shift to reverse it is delayed with a sudden slam shift. It is intermittent and seems to operate O.K. afterwards. I saw a post referencing the reverse servo and wondered if anybody could supply me with info on needed parts (seals,gasket,etc). Also, I do not have any of the shifting problems others have but was wondering if it would be a good idea to update the plate and gaskets per the bulletin while I have it opened up. Another minor problem is related to the parking pawl not engaging and the vehicle rolling foward a few feet while making a skipping sound. Does anyone know whether the pawl engagement is totally mechanical with a direct mechanial connection or does it operate with any hydraulic pressure? Any type of adjustment on the linkage? I only tow a boat about once a month and just drive to work and try to take it easy. Since the reverse problem started I try to give the tranny a couple of seconds to make the shift before I gas it which seems to help but I need to fix the problem. I would like to take a proactive approach to fixing it and any other problems I can knock-out at the same time while servicing it and adjusting the bands. Thanks,Greg

 

[Glacier991]

Reverse problem can be the servo, and it can also be a sticky boost valve. Both CAN be DIY repairs with the trannie in the car. The parking pawl is purely mechanical. A cog stuck into some square gear teeth. (rough description but more or less accurate).

I'd say you nmight be a great candidate for a valve body rebuilt with a shift kit added, and a new sonnax boost valve, plus the low reverse servo seal replacement.

 

[greg s]

5r55e parts diagram & suppliers

Thats kinda what I was thinking about. Does anyone know where I can find a parts diagram of the valve body and parking pawl? Also good suppliers on the web for the parts? I am not sure if I want to put a shift kit in it unless it is going to prolong the life of the tranny I dont want harsh shifts as I mostly drive highway.

 

[TPLYNCH]

Try Fordpartsnetwork for parts. They are a site sponsor, and have a very good reputation with everyone here who uses them. Torrie is the contact. I think there a Bulkparts(?) site also that members have gotten updated tranny gaskets/filters from.