4R70W Front Driveshaft Concerns

[fordguy]

In my searches it looks like 2 diameter for front driveshaft will get yo by on a stock pan? I have 2.5 lift and 1 inch body. What has been the rear world experience, thinking about Tom Woods. Buttoning things up on the frame, getting ready for exhaust and driveshafts.

 

[BanditBronco]

I would definitely get driveshafts in it before getting the exhaust figured out. If they are good they can make the exhaust fit without any issues. I think your clearances should be fine. I have a high pinion and a 2" shaft that contacts the exhaust. Once it self clearanced its all good. Not your exact set up but if I can fit it with a high pinion you will be all good with a low pinion.

 

[rcmbronc]

I used a standard Tom Woods on my 4R70W with no issues.

 

[bigmuddy]

I am headed down this route myself very soon.

From my reading it depends on how high the T case clocked.

 

[Broncobowsher]

I just had a local driveshop make it.

 

[tasker]

TOM WOODS here! big fan and were super easy to deal with! 4R70W with 351 EFI

 

[markw]

Me too. Tom Woods front and rear. 427/4R70W/D20.

 

[spap]

Tom woods front shaft standard 4r70w with a 3.5 SL. No issues

 

[fordguy]

How much leeway is in the stock driveshafts? Due to adapter the rear driveshaft will be shorter and the front will be longer by < 2 inches

 

[bigmuddy]

I have fairly new driveshafts from when I installed the ZF tranny. I will probably just have them shortened and lengthened locally.

 

[bax]

Carolina driveline for me. 2'' shaft dia. No issues with trans clearance, exhaust is tight 2 into 1. But it works. High pinion 44.

 

[fordguy]

Roger where does the e haunt get tight, I am running down passenger rail, out of stock 2001 exhaust manifolds

 

[bax]

Roger where does the e haunt get tight, I am running down passenger rail, out of stock 2001 exhaust manifolds

I used my stock 302 exhaust manifolds. Tried to use the stock explorer manifolds but didn't like them. With my exhaust the drivers side was coming straight down out of the manifold. and then turning sharp between the oil pan and the transmission. I had to cut off the pipe near the manifold install 2- 45 degree pipes keeping them as far away from the driveshaft as I could. This worked great for me. I can get a picture if you want.

 

[BanditBronco]

I used my stock 302 exhaust manifolds. Tried to use the stock explorer manifolds but didn't like them. With my exhaust the drivers side was coming straight down out of the manifold. and then turning sharp between the oil pan and the transmission. I had to cut off the pipe near the manifold install 2- 45 degree pipes keeping them as far away from the driveshaft as I could. This worked great for me. I can get a picture if you want.

Agreed, coming off the drivers side header/manifold, most exhaust shops will just throw a 90* bend in there an either run it between the pan and bell housing or between the bellhousing and the trans pan. Middle of this 90* bend is usually where the driveshaft contacts. using a double 45* gives you a "flat spot" between bends allowing more driveshaft clearance.

 

[fordguy]

I used my stock 302 exhaust manifolds. Tried to use the stock explorer manifolds but didn't like them. With my exhaust the drivers side was coming straight down out of the manifold. and then turning sharp between the oil pan and the transmission. I had to cut off the pipe near the manifold install 2- 45 degree pipes keeping them as far away from the driveshaft as I could. This worked great for me. I can get a picture if you want.

Roger, a pic would be nice. Is your front shaft stock diameter?

 

[bax]

Roger, a pic would be nice. Is your front shaft stock diameter?

I think it is smaller. I will get a picture today.