Fixed It!!!!!

[Croatan_Kid]

Well...a short lived victory was putting in my freshly built 700R4. It crapped out about 30 miles later

Anyway, last night and this morning I pulled it out and proceeded to take it completely apart...AGAIN....only to find absolutely nothing wrong with it! The clutches still had the manufacturers writing on them!

I think my problem was partially the clutch material from the previous owner who SMOKED the clutches...bad. After I pulled it apart and cleaned everything out, it worked great! Also, I used Advance Auto house brand trans fluid, bad idea. This time I used Type F and all is well.

 

[CCATLETT1984]

congrads, glad it was a cheap fix, although a messy one

 

[aboonski]

Are you using a 700R4 behind a 6.2 in your M1008? I have one that I pulled out of an 86 K5 that was rebuilt but it is from a 350 TBI motor - not diesel. What has to be done to make the swap? I am also curious to know if it does anything to improve the top speed and fuel economy.

Al Broadbent

86 M1008A1

 

[CCATLETT1984]

you get a little more top end with the truck in overdrive, and better mileage if you keep your foot outa the pedal. But, dont tow with it in O/D its bad for the trans.

 

[Croatan_Kid]

You'll need to get a low stall, diesel converter, a diesel governer for the trans (blue gear on the end) and a spring in the throttle valve needs to be changed out. No big deal really. Most 700Rs were behind gas motors...mine was too and I had to change a few things, but I was rebuilding it anyway...


Thankfully it was a fairly cheap fix...about 60 bucks for 18 quarts or Type F trans fluid and a new transmission filter kit. Not too bad, plus I did all the work myself.

 

[Ambulancechser]

good...

Excellent...i'm pleased that the damage was limited to agravation.not breaking hard parts is always a bonus.

now...go find a bog to womp through.Play time!

 

[AJMBLAZER]

RE: good...

Isn't Type F the Ford spec tranny fluid?

Seems to me the 700R4 should get the latest Dexron whatever. IV or something now I think.

 

[Croatan_Kid]

Yeah, it's the Ford stuff. It's much better than the multi-vehicle crap that most people seel now and at "only" 2.88 a quart, it's much cheaper than Dexron 6 at 5.20 a quart! I think the local fellers run it in there mud bog trucks too. I don't see where it will hurt anything, but if it does I will report.

My buddy works at Advance Auto and he looks at the labels of stuff quite a bit and noticed that one the back of B&M Trick Shift it says "meets or exceeds Type F specifications".

 

[AJMBLAZER]

Ford's got a variety of additives and special requirements in their trans fluid. Not sure what those are though.


If I recall correctly Valvoline and Mobil make Dexron specific trans fluids. Will be able to tell you soonish as Big Ugly needs a trans fluid change.

 

[Croatan_Kid]

Forgot to mention that until tonight, I hadn't ever had a torque converter lockup kit installed. It was hard to hold a constant speed with the converter working against the motor and the OD gear with the constant slippage between them. I take that back, I had the external part of the lockup installed, but came to find out that the internal portion has/had a ground wire that was run externally. I replaced it all anyway for piece of mind.

Anyway, put in the lockup kit I got from Bowtie Overdrives. It's a brake light switch style and I opted for the extra 3rd gear lockup kit. Now when I'm in 4th gear with the TC locked, it's awesome! I can speed now!

Using 38" (conservatively, more or less) for my tire diameter and a speed of 65 MPH with a 30% OD gear plus 4.56 gears, I'm only turning 1835 RPM!!!!!!!!!

 

[BobM]

I'm glad it was an inexpensive fix. Do you check mileages? If so, let us know what kind of difference you get. I had an old '84 'burban with a rebuilt 700r4 that lasted for years and that was with a 6" lift and a teenager!

 

[84cucv1ton]

want to put a 700/205 in mine. still working on the parts to do it.

 

[Croatan_Kid]

I was going to get a 27 spline 205, shifter and t-case adapter for free and that's an awesome deal you don't just come across every day. However, I would of needed new driveshafts and all that stuff, so it was more trouble that it was worth.

I think you need a TH350/NP208 spacer and you have to cut the tailshaft of the 700.

http://www.wheelindixie.com/forums/showthread.php?t=1718

That might help you out some.

 

[84cucv1ton]

thanks for the link. i have a few spacers laying around. if you friend has the 205 and all that i will buy it from him.

 

[Bozor1000]

TYPE F is mopar trans fluid. Dexron/Mercon is the trans fluid for GM (DEXRON) and FORD(MERCON). They are usually sold as one type for both brands if you buy aftermarket from any parts house other than the dealer. TYPE F is DODGE/CHRYSLER. I have never heard of any guys using that TYPE F out here in their GM's.

 

[Croatan_Kid]

Any type of fluid is better than multi-vehicle ATF crap. I like the Type F, it makes it shift firmer. All the bottles of it I have say "meets or exceeds Ford standards"....but it doesn't matter to me, it works great.

 

[tacoma]

Type F changes the shift characteristics of GM trannies, but I can't remember if it makes them harder, or softer. Auugh my brain

 

[Croatan_Kid]

Definitely firmer! Mine has very strong 1st-2nd shifts and 2nd - 3rd is nice too!

 

[ehuppert]

Type "F" is definitly Ford spec fluid. Will give firmer shifts than dexron due to lack of (or less) friction modifiers.

The B&M Trick shift is basically a enhanced type F.

Common for high performance GM to use the Type F fluid (My 12 sec drag camaro for instance)