Thread: dumb trans questioin...
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04-09-2006 11:03 AM #1
dumb trans questioin...
ok if i buy a trans rebuild kit for my trans it makes it like new right?
how hard is it to rebuild a trans?
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04-09-2006 11:46 AM #2
First, buy this book: http://www.amazon.com/gp/product/089...Fencoding=UTF8
It depends on how extensive of a kit and what is wrong with your transmission. Most kits don't come with bearings and such and none com with front pumps. I recently rebuilt my TH350. I used the Hughes kit that does come with bushings. I used a chisel to remove the old bushings and made some bushing drivers out of some cheap sockets I had laying around. The pistons that operate the clutches can, with the exception of one, be removed with c-clamps. The one on the rear of the case required a special tool. I made one using parts of a harmonic damper pulley, some bolts, a piece of a turnbuckle, and a big washer. You will have to assemble the transmission sever times because you have to select the correct thickness of thrust bearings to put in the transmission. All of this will make your transmission like new. It was very high up on the difficulty scale, especially cutting out bushings with a chisel. I didn't need to change any bearings except for the bearing between the front pump housing and torque converter. You may not need to change any at all. In that case, to freshen up a transmission with new clutches and no hard parts isn't particularly difficult. I also had to replace my front planetary set.
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04-10-2006 07:23 PM #3
to be totally honest i dont know what it needs. i know i have no 2nd 3rd or OD
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04-10-2006 08:20 PM #4
I had a thrust bearing failure on my front planetary set that caused of of the gears to wear through the carrier. No big deal, the other 3 gears in the planetary set took up the load. But, as the gear wore through it filled the tranny fluid with metal shavings that eventually plugged the filter. I lost all gears forward and reverse when this happened.
I don't know the 4 speeds well, but I would guess that you are either not getting fluid pressure to any of the pistons that operate the front planetary set or your the clutches for the front planetary are severely worn. Low and reverse are done by the rear planetary in the 3 speed which would explain why you have low and reverse but no other gears.
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04-11-2006 04:58 PM #5
What trans? 700r4
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04-11-2006 07:34 PM #6
yes sir it is.
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04-12-2006 12:02 PM #7
I lost 1st and OD...it was a shifting solenoid (fairly cheap)...it was a 4L60E, so it might not be the same. Just thought I'd throw it out there.Wes...aka "BigRed"
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04-12-2006 06:47 PM #8
First, i would check the govenor, on the passenger side just in of the tail
housing pull it hold it gear up move the weights and you should be able to see the valve move in the slot in the middle. What does the fluid look like
color, smell, etc. How many miles, how long has it been for service.
Terry
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04-12-2006 07:38 PM #9
Duh, I forgot to ask. Does the transmission just not shift out of first or does it shift out and feel like it's in neutral.
If it wont shift out of first, that is easy. It's either a governor problem like stated above, but more likely your vacuum line from the intake manifold to the vacuum modulator is not hooked up, damaged, or kinked. Possibly, the vacuum modulator is bad, you could replace it to see what happens. It's one bolt and costs about $7.
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04-14-2006 12:16 AM #10
umm the trans has 140000 miles on it. i had 1st and 2nd but then 2nd went on me too but before it when it shifted outta 1st it sounded like it was going into neutral (thats what D and OD did too) and now i got just 1st and reverse
and tl34ru i kinda get what your sayin but i kinda dont can you explain it a bit better to a retard like me?
thanks guys
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04-16-2006 09:19 AM #11
Chances are the froward clutch plates are worn out along with the 3-4 clutch
plates, the govenor is what makes the trans shift govenor pressure overcomes
throttle pressure to shift the trans the detent cable at the throttle body controls the shift points.If you was to build this trans my suggestion would be
look up atsg (automatic trans service group) on the internet get a manual from them and read through it look at what tools you will need, as for a parts
I perfer raybestos clutches.
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04-16-2006 09:21 AM #12
I would also put a new/reman torque converter it
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04-16-2006 03:09 PM #13
well im planning on a performance rebuild so i can stuff it in my camaro. so besides the book i would need a performance rebuild kit?
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04-17-2006 01:56 AM #14
Don't get that book for your tranny, it is for a turbo 350. You'll need one for a 700r4 which I can't find at the moment. I recommend you buy the book before buying your parts and read through it. There are a lot of special tools, some of them you may need to locate. For most you will be able to improvise. I was able to improvise all of them on my 350, but the 700r4 is a little more complex. To do a performance rebuild, just grab yourself a good set of clutches and steels. The Hughes kits get the job done. They don't come with any valve body modifications, but even without, my 1-2 full throttle shift is firm enough to chirp my 265 wide tires.
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04-18-2006 01:36 AM #15
ok thanks. i gotta wait till i get my 3 speed to see if ill need a new driveshaft. if i do im rebuilding the R4 instead
Merry Christmas ya'll
Merry Christmas