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gchemist · 03-26-2002, 08:16 AM

Okay my spill time.

The 350TH/400TH OD units in poor man's terms is a locking torque conveter. No gear just a locking torque converter. The 700R4 is a gear OD unit and a poor mans "5th gear" is a locking torque converter. The 700R4 is nearly identical to the 400TH in size. The 700R4 can be rebuilt to take a beating. I have one in my truck that is built for 450+ HP.
smonty,
The builder I have is works from a small down outside of Austin. Since you live in Dallas I know a few board members that can probably recommend a good shop up there. I know guy who just put a panel truck on a 84 (?) 4X4 frame and had a 700R4 built for it.

Adding a 700R4 to your truck is worth the effort. I would want to drive the truck to work too. I just love seeing good old running trucks on the road. I don't own a 67-72 truck but here is what I would do. Change the column to an automatic type. Unless you plan on drive it at the track the only gears you need are R-N-D-3-2. The first is not necessary but sure is fun. The TV cable is no problem when you know how to adjust it. A good TV bracket cable will cure a lot of problems. The locking torque converter is not a problem either. You can buy a kit to take advantage of a locking torque conveter. If it does not lock you only loose about 200-300 RPMs. An external tranny oil cooler is recommended for a locking and nonlocking torque converter. The locking kit is usually tied to your brake switch. Hit the brakes and torque converter unlocks. The conveter will lockup again once you reach its stall speed of say 1800+ for such a heavy truck. The wiring kits are available from www.jegs.com www.summitracing.com and www.painlesswiring.com

A long tail shaft 350TH tranny drive shaft should be just about the right size. It's important to have the driveshaft balanced for the 700R4. The shaft will be turning some high RPMs so it should be balanced to reduce vibrations and destroying some U joints.

I cruise at 70 MPH with only 1950 RPMS with a 3.08 rearend. Better than close to 3000 RPMS with your setup. Save a lotta gas too!! That high reving 327 will love the 700R4.

------------------
Gerardo
1983 Custom Truck
TX Plates: "BAD BOW"

03-26-2002, 08:16 AM	#11
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Okay my spill time. The 350TH/400TH OD units in poor man's terms is a locking torque conveter. No gear just a locking torque converter. The 700R4 is a gear OD unit and a poor mans "5th gear" is a locking torque converter. The 700R4 is nearly identical to the 400TH in size. The 700R4 can be rebuilt to take a beating. I have one in my truck that is built for 450+ HP. smonty, The builder I have is works from a small down outside of Austin. Since you live in Dallas I know a few board members that can probably recommend a good shop up there. I know guy who just put a panel truck on a 84 (?) 4X4 frame and had a 700R4 built for it. Adding a 700R4 to your truck is worth the effort. I would want to drive the truck to work too. I just love seeing good old running trucks on the road. I don't own a 67-72 truck but here is what I would do. Change the column to an automatic type. Unless you plan on drive it at the track the only gears you need are R-N-D-3-2. The first is not necessary but sure is fun. The TV cable is no problem when you know how to adjust it. A good TV bracket cable will cure a lot of problems. The locking torque converter is not a problem either. You can buy a kit to take advantage of a locking torque conveter. If it does not lock you only loose about 200-300 RPMs. An external tranny oil cooler is recommended for a locking and nonlocking torque converter. The locking kit is usually tied to your brake switch. Hit the brakes and torque converter unlocks. The conveter will lockup again once you reach its stall speed of say 1800+ for such a heavy truck. The wiring kits are available from www.jegs.com www.summitracing.com and www.painlesswiring.com A long tail shaft 350TH tranny drive shaft should be just about the right size. It's important to have the driveshaft balanced for the 700R4. The shaft will be turning some high RPMs so it should be balanced to reduce vibrations and destroying some U joints. I cruise at 70 MPH with only 1950 RPMS with a 3.08 rearend. Better than close to 3000 RPMS with your setup. Save a lotta gas too!! That high reving 327 will love the 700R4. ------------------ Gerardo 1983 Custom Truck TX Plates: "BAD BOW" __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos