Another shoebox question - Transmission mount

I'm positioning a 700r4, and the ****** mount lands in the middle of the stock crossmember.

How do these Jamco mounts work?

How did you guys mount your trannies?

If it just lies on top of the stock crossmember, it seems like it will be too high, and need considerable modification of the trans cover, and possibly the driveshaft tunnel.

If I modify the crossmember, take some of the "depth" out, and mount the back of the ****** lower, it may put the engine at an odd angle.

Anybody got any pics?

Thanks in advance.

Rich

 

What, no auto trannies in shoebox fords?

Give me a little insight

Rich

 

Going thru same thing. Tripower 348 700R4 in a 50 shoebox. We cut into crossmember to get the mount to work. Still had to cut quite a bit of the floor but I knew that was going to happen. What I am concerned about is I am not sure if I like the angle of the motor. carbs are not on engine ,set a level on intake manifold shows 2 degrees higher in front but just does not look right.
What do you guys think of the 2 degrees, too much or what.

 

EXACTLY, what I am pondering on....


Rich

 

I will subscribe to this because I am going to be dropping a 200-4R into my 49 Ford Shoebox. I'll let you guys know what I find out on mine. Hopefully I do not run into any problems here with my OD trans...

 

My understanding is that the carb base pad on the manifold should be level. Most carb pads are not parallel with crank centerline, but angled 2 to 3 degrees, so that with the carb leveled, the engine centerline is angled downward at the rear that same 2 or 3 degrees.

If you start with the carb pad at some degrees from level, you are likely increasing the rearward tilt that much more. That could easily account for it "not looking right"

One popular way to do this is to set the ch***is at the desired ride angle, either level or raked to front or rear, THEN set the engine/trans in place with the carb pad level.
You may want to raise of lower the engine/trans centerline for ch***is/body clearance, but DO NOT alter the angle established above.

From that point you fabricate mounts for engine and trans that maintains the relationship. If that means modifying or fabricating a new trans crossmember, so be it.

The final step is to set the pinion angle to be parallel with the engine/trans centerline.

Ray

p.s. the '49/'50 shoebox trans hump is lower than in '51 models...that being because the '49/'50 only came with a rather small 3 speed manual gearbox. When the Fordomatic was introduced for '51, the hump was raised for clearance. To get the engine/trans positioned where it would fit best in the ch***is, it may well be desireable to modify the floor hump.

 

Rodster,

I don't think you necessarily need to be concerned about the engine being at an odd angle.

You just have to use the components (motor mounts, tranmission mount and rear leaf shims) to get to an acceptable driveshaft alignment between the transmission and the rearend.

The trans output shaft and the pinion shaft need to be parallel to each other and preferrably within ~ 3 degrees of a line between the trans output shaft and the pinion shaft. (there are a lot of good articles with drawings explaining this alignment process)

You'll probably need to modify the trans crossmember and tunnel accordingly. Then start your adjustments by aiming the trans shaft just above (~ 1 inch) the center of the pinion yoke, and the aiming the pinion shaft (~ 1 inch) below the center piont of the trans shaft.

I ended up using 4 degree shims on the rear leaf springs.

Regards,
X

 

check my thread yblock292 51 custom build..shows my aod in the 51

 

I am running a 350 TBI with a 700R4 in my '50 Ford and you will have to raise your tunnel. I used the Chevrolet trans mount that only has one mounting fastener where it connects to the crossmember. I modified the crossmember like you described by cutting and lowering the area where the trans mount bolts. For engine mounts I used the motor mount brackets from a '64 Impala and modified them to connect to the Ford crossmember. The engine sets in place nicely and looks like it came from the factory. Ray at Shoeboxford.com said my installation is one of the best looking he has seen in all the years he has been working on them.

PM me if you want to chat and I will give you my phone number.