What is missing from this rear crossmember?

[derotoreut]

Can someone tell me what is missing from this rear crossmember. There are two bolts that are captive in the frame and it looks like there might have been something that goes around the drive shaft maybe. Pictures would be helpful. This is on my '69 C20 truck. Thanks for your help.

[FirstOwner69]

Interesting. Is that cross piece with the bolts riveted on? All I can say is that my 69 3/4 ton with coils in the rear doesn't have that piece and never did.

Here's the best picture I can find:

[bollybib]

Since the lower bracket is riveted, it's probably factory. The upper bracket is bolted so likely was added later. Maybe it originally had the U shaped bracket type center shaft support and was later modified to accept the hanging rubber donut type that is shown in your pic.

I found two pics of mine showing the same location (partially) on my 69 C20. The upper bracket is riveted and there is no lower bracket.

[Daaaanz67]

My69 has that it's for the wide style carrier bearing two piece drive shaft I'll post picture if I can find it
Posted via Mobile Device

[derotoreut]

Originally Posted by FirstOwner69

Interesting. Is that cross piece with the bolts riveted on? All I can say is that my 69 3/4 ton with coils in the rear doesn't have that piece and never did.

Here's the best picture I can find:

The crossmember piece is riveted to the frame, and the bar going across the bottom of it is also riveted to it. Thats why the bolts are captive and cannot be removed. I'm not sure what bolted up to it.

[Daaaanz67]

Here you go
Posted via Mobile Device

[derotoreut]

Originally Posted by bollybib

Since the lower bracket is riveted, it's probably factory. The upper bracket is bolted so likely was added later. Maybe it originally had the U shaped bracket type center shaft support and was later modified to accept the hanging rubber donut type that is shown in your pic.

I found two pics of mine showing the same location (partially) on my 69 C20. The upper bracket is riveted and there is no lower bracket.

Thanks for the pictures. OK, now it makes more sense. You're right... the upper bracket is bolted while yours is riveted. So it seems that someone might have removed the U-shaped center shaft support and installed the hanging rubber style type. I am not familiar with either, but it seems to be what happened based on the fact that the top drive shaft support is bolted and not riveted. I don't know if one was better then the other, but when I found those bolts captive on the bracket it was apparent that something was missing and I was concerned.

Does anyone know the difference in the two styles of driveshaft supports? What years where they on? Is mine OK the way it is?

[Daaaanz67]

My truck was equipped with the granny four speed trans maybe that's the difference and the autos got the hanging type maybe someone else can chime in.
Posted via Mobile Device

[FirstOwner69]

Originally Posted by derotoreut

Does anyone know the difference in the two styles of driveshaft supports? What years where they on? Is mine OK the way it is?

Probably. As I stated above, mine has always had the top mount carrier as you have installed. Mine's a 350. Does anyone know if the big block used the other style pictured above for your bracket?

[bollybib]

A look at the NAPA site for 69 C20 parts gives this info.


Driveshaft Bearing & Support
Part Number: BRG HB88107A
Product Line: NAPA Bearings
IMPORTANT INFO: w/ Leaf Spring Suspension





Driveshaft Bearing & Support
Part Number: BRG HB206FF
Product Line: NAPA Bearings
IMPORTANT INFO: w/ Coil Springs

[Daaaanz67]

My truck is a c/10
Posted via Mobile Device

[derotoreut]

Originally Posted by bollybib

A look at the NAPA site for 69 C20 parts gives this info.


Driveshaft Bearing & Support
Part Number: BRG HB88107A
Product Line: NAPA Bearings
IMPORTANT INFO: w/ Leaf Spring Suspension
Attachment 960207




Driveshaft Bearing & Support
Part Number: BRG HB206FF
Product Line: NAPA Bearings
IMPORTANT INFO: w/ Coil Springs
Attachment 960208

Thanks for the information. What is really strange is that my C20 is a coil spring truck, but it looks as though it may have had the leaf spring style driveshaft support, based on the captive bolts and riveted support bracket. Now it appears to have been changed to the coil style support as indicated by the bolted on upper assembly.