How do I figure out what Tranny I have

snoopt · Apr 20, 2005

I have an 84 f150 4x4, it has a 351W with an auto tranny. It has D, 1 & 2. I don't know what type it is, but it is leaking and so is the engine and so are the brakes... anyways, I am looking to rebuild the drive train. I was looking at some other posts and was considering a swap. I want good power, but also drive it everyday. Any recommendations on an engine & tranny swap. I am not new to working on cars, but to this level I am. I want to do the job myself and am going to purchase a used engine and tranny and do the rebuild then do the swap. So any advice is great.

Shadow_D · Apr 21, 2005

Welcome to the Zone!

If there is a push button on the dash or shifter for "Overdrive" then you have an E4OD, if not then I think you have a C6.
E4OD will cost you up to around $1600 to have it rebuilt. I'm not sure how much it would cost to have the C6 rebuilt.

indoz · Apr 25, 2005

snoopt said:
I have an 84 f150 4x4, it has a 351W with an auto tranny. It has D, 1 & 2. I don't know what type it is, but it is leaking and so is the engine and so are the brakes... anyways, I am looking to rebuild the drive train. I was looking at some other posts and was considering a swap. I want good power, but also drive it everyday. Any recommendations on an engine & tranny swap. I am not new to working on cars, but to this level I am. I want to do the job myself and am going to purchase a used engine and tranny and do the rebuild then do the swap. So any advice is great.

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Hey Snoopt, good to cu here, before you start ripping into your drivetrain a question, How does she drive?Are the gearchanges smooth ? Where are the tranny and engine oil leaks?I am asking these questions in case fixes are easily performed rather then an expensive complete swap.
Henk from Oz

snoopt · Apr 26, 2005

It has no dash button or shifter button, ateast none I have found. I figured C6, but I have not had experience with 4x4's so I didn't know what was standard. Of course I figured the owners manual would help, didn't. I even have the original window sticker, can't seem to make that out to see if it tells or not. :-B

Not exactly sure where the leaks are. I need to get underneath and take a look. While the tranny fluid is full the gearchanges are failry smooth, they do have a little pop to them but I read somewhere that was good. It meant it was positively switching gears, not "sliding" into them i.e. it has good fluid pressure. I have only had her for 8 months or so. She drove fine around town when I got her, then i took a trip to Baltimore one day and she started overheating about half way down and I notice the oil pressure had dropped. I pulled over and put oil and coolant back in, did that til I got her back home. Now I am back to in town driving and put a quart of oil in every month or so, and a quart of tranny fluid every 2 months. After the engine warms up the oil pressure stays low while I am driving. The coolant seems fine now, but I haven't driven further than 30 or 40 miles straight and I haven't been back on any type of interstate since.
I had an old, 77, f150 with a cm400/cg combo and it seems all the battles I had with that truck were completely different. Wouldn't you know none of my previous experience seems to be a help!!!!

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Thanks all for your advice and tips.