Replacing T350 with a 700-R4

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Replacing T350 with a 700-R4

Postby h-bot » Wed Mar 13, 2002 5:02 pm

From: krayzee428_REMOVE_170584_THIS_@yahoo.com


I'm wondering if I'm going to have to modify my
driveline, torque arm, & transmission crossbrace, or if it's
pretty much a direct replacement. I know the 82-92
Camaro's along with astro vans & some others used the
torque arm setup, so that part of it should be fairly
easy. I've also heard about having to run a converter
lockup for 4th gear, & needing an earlier,
non-electronic tranny, etc...I'm just getting tired of not being
able to DRIVE my car. it's got 4.10 gears, so having a
T350 along w/22" tall tires means 60mph is around
3,750rpm.
Thanks guys
~Kris
< Krayzee428@yahoo.com >


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Replacing T350 with a 700-R4

Postby h-bot » Wed Mar 13, 2002 5:15 pm

From: Bacchus_101573_REMOVE_992611_THIS_@yahoo.com


Your first question, yes, yes, and yes.


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Replacing T350 with a 700-R4

Postby h-bot » Wed Mar 13, 2002 5:17 pm

From: Bacchus_101573_REMOVE_225275_THIS_@yahoo.com


Oh, and a 22" tall tire is pretty darn short. What size tire are you running?


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Replacing T350 with a 700-R4

Postby h-bot » Wed Mar 13, 2002 5:52 pm

From: krayzee428_REMOVE_349291_THIS_@yahoo.com


205/60/13's


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Replacing T350 with a 700-R4

Postby h-bot » Wed Mar 13, 2002 6:23 pm

From: Bacchus_101573_REMOVE_921821_THIS_@yahoo.com


Hmm, get a taller tire? Now, I would go for the
700R4 AND a taller tire (15 or 16" rims with lower
profiles is still gonna get you a 25"+ tire) but it all
depends on your budget, etc. Both have their pluses and
minuses. Bigger wheel/tire combo should give you more
traction and a lower highway RPM, not to mention more
wheel/tire choices. However, it'll probably require you to
redrill or replace the axles. That problem isn't too bad,
though, considering the S-10 axles slide right in. Then
there's the problem with matching the front wheels.
Again, that's not a problem with Bob Gumm's adapters and
an S-10 spindle/caliper/rotor upgrade, or you can
simply redrill them or you can leave what's on
there.

Now, a 700R4 installation, lots more work, but not
undoable. Shorten driveshaft, move trans mount, make custom
torque arm mounting bracket, and you're all set.


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Replacing T350 with a 700-R4

Postby h-bot » Wed Mar 13, 2002 9:57 pm

From: rampeyboy_REMOVE_140449_THIS_@yahoo.com


Though I'm not sure I believe it, but I think I read recently that the 200r4 is the same length as a TH350. Have you considered that option?


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Replacing T350 with a 700-R4

Postby h-bot » Wed Mar 13, 2002 10:11 pm

From: cosvega76_REMOVE_907785_THIS_@yahoo.com


I just sent out a 200-4R to get beefed up for my
Vega. Yes, the 200-4R is the same length as a
short-tail TH350. Unfortunately, the trans mount is in the
same place as the TH400, so the crossmember must be
moved. Also, my trans man said he likes the 200-4R over
the 700R4 for small blocks since the 200-4R has a
tighter gear spread for 1st and 2nd gear; there's less
RPM drop for the shift.

Chuck


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Replacing T350 with a 700-R4

Postby h-bot » Wed Mar 13, 2002 10:41 pm

From: Phantom402_REMOVE_439006_THIS_@yahoo.com


Only vehicles in production that I know of after the hbody was fbody's and chevettes/clones.
I know for a fact that the astro van NEVER ran a torque arm.
Lee


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Replacing T350 with a 700-R4

Postby h-bot » Thu Mar 14, 2002 12:51 pm

From: stage169_REMOVE_681757_THIS_@yahoo.com


Kris,
I'm planning on a 2004R for my Skyhawk.
Same mods but you don't have to change the drive
shaft. The rear mounting point for the trans is just a
little over 6" longer than the TH350. The gearing is
similar to the TH350 and has a little advantage over the
700 gearing if 1/4 mile times are a concern (doesn't
drop the rpm's as much). Steve Holmes from Bow Tie
Overdrive responded to a club member and talked about both
trannies saying that with their mods the could handle
550hp. Check this out if you want. <a href=http://www.700r4.com target=new>http://www.700r4.com</a>
Brian


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Replacing T350 with a 700-R4

Postby h-bot » Sun Mar 17, 2002 12:08 am

From: denisst78_REMOVE_499133_THIS_@yahoo.com


yep hte astro didn't use a torque arm, but it has 2 ears on the tailhousing so that the monza torque arm support can be bolted to it
Denis
ps the ears were there to mount a big weight


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