700r4 question

[bigdog1985]

Any suggestions on a conversion to a 700r4
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[GMCJOE]

What kind of suggestions are you looking for? Where to buy, how to do it, and such?

[bigdog1985]

I have the trans just looking for how best to install it. I am assuming the drive shaft will need to be shortened and the converter lockup will need a kit. Tci kit? Etc.

Thanks

350 small block 545 heads light cam performer intake and edlebrock 1401 carb
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[GMCJOE]

A new cross member, unless you want to use you current and drill new holes in the frame. Shorten the drive shaft. If you have a lock up converter, yes you will need the lock up kit. If you have a non lockup converter, then you don't need it. You will need a kick down cable(TV cable). Need a rear tail for the transmission that runs a manual speedometer gear.

I think that is about it, but I could be missing something here. I can't recommend any certain kit for the lock up. I do know TCI provides pretty good products.

[bigdog1985]

I have a converter. How do I know if it is a lockup or not

Will the yoke fit? Can you just cut it without cutting the drive shaft?
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[bigdog1985]

Oh. I have the kick down cable and mechanical speedo output.
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[GMCJOE]

You have to have a yoke that has the same spline count as the output on your transmission. I would just take the truck and the drive shaft to a shop and have them cut it down, cause you want them to balance it else you will have a vibration. Make sure you have the bracket kit to hook up the kick down cable to your carb.

I have no clue on how to tell which torque convert you would have (lock up or non lock up).

[WIDESIDE72]

If you do a little searching you can find a one piece driveshaft out of a later model Swb chevy/ GMC w/ a 700r4 that will swap right on for $50-$100.

Also, be sure you have the TV cable adjusted correctly or you could ruin the trans iness than 5 miles!
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[WIDESIDE72]

Originally Posted by bigdog1985

I have a converter. How do I know if it is a lockup or not

Will the yoke fit? Can you just cut it without cutting the drive shaft?
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I believe all700r4 had lockup torque converters unlessit is an expensive aftermarket converter. No way to tell externally that I know of. It isthe electrical connector on the case.

The yoke is not the issue. The shaft is.
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[GMCJOE]

Originally Posted by WIDESIDE72

If you do a little searching you can find a one piece driveshaft out of a later model Swb chevy/ GMC w/ a 700r4 that will swap right on for $50-$100.

Also, be sure you have the TV cable adjusted correctly or you could ruin the trans iness than 5 miles!
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I like your thinking. I, myself, had not done the research on that or thought about it. Are you talking about an 88 model on up into the 90's? I know the 4L60E is virtually the same transmission as the 700r4, so I am guessing those short bed models would work also for the donor drive shaft?

[chevy6869]

i only had to have the drive shaft shortened. it was two piece but had them make one solid shaft and balance it. on my 700 it has a plug on the driver side for the lock up maybe check if yours has also. and not sure if i ran it right but i actually wired my own for lock up used a switched fed it 12 volt and it locks up fine when going down the highway. you just flick the switch on.

[VetteVet]

This will answer most of your questions.
...........http://67-72chevytrucks.com/vboard/s...ad.php?t=33266

If that don't do it then here ya go.

................http://www.google.com/custom?domains...D%3A1%3B&hl=en

[WIDESIDE72]

Originally Posted by GMCJOE

I like your thinking. I, myself, had not done the research on that or thought about it. Are you talking about an 88 model on up into the 90's? I know the 4L60E is virtually the same transmission as the 700r4, so I am guessing those short bed models would work also for the donor drive shaft?

GM started putting overdrives in trucks in 1982. I believe the length is 57" center to center from u joint to u joint

[ubtripn]

I put a 700R4 in mine and did not bother to get the speedo kit. I used a GPS speedo instead. Waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay cheaper.

[GMCJOE]

Originally Posted by ubtripn

I put a 700R4 in mine and did not bother to get the speedo kit. I used a GPS speedo instead. Waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay cheaper.

Lol... yeah, but if you already have the mechanical speedo tail you don't have to go that route. Plus, you can find them tails out in the salvage yards or on Ebay cheaper than buying a GPS.

[bonnieclyde100]

if your changing from a th350 to 700r4 you probably can use the same slip yoke. if changing from th400 to 700r4 you need a new yoke.