1960 PG Bolt Identification

[Joe M.]

There are supposed to be two bolts that pass through the crossmember/mounting rubber cushion/mount retainer and finally into the PG bracket. I found one bolt and it is shown in the two attachments. The other bolt was missing. I have not found a parts vendor that has anything like it.

Is this one of the original bolts?

The parts catalogs and the AIM page covering 3 or 4 speed show a standard shaped bolt (7/16"-14x2") entering from the top down.

Are the PG bolts and entry from top down the same as 3-4 speed configuration?

[Joe L.]

Re: 1960 PG Bolt Identification

There are supposed to be two bolts that pass through the crossmember/mounting rubber cushion/mount retainer and finally into the PG bracket. I found one bolt and it is shown in the two attachments. The other bolt was missing. I have not found a parts vendor that has anything like it.

Is this one of the original bolts?

The parts catalogs and the AIM page covering 3 or 4 speed show a standard shaped bolt (7/16"-14x2") entering from the top down.

Are the PG bolts and entry from top down the same as 3-4 speed configuration?

Joe-----


First, let me say that I have absolutely no specific knowledge of this installation or bolt. However, having said that, my opinion would be that this is likely an original bolt. For one thing, it's a captive lock-washer-type bolt and those are pretty much an OEM type of thing----not something you find in a hardware store or, even, auto parts store.

Second, it's a piloting type bolt (pointed end). This is another feature of bolts used on assembly lines but not generally available in the aftermarket.

Third, the head configuration and manufacturer's ID (WB= Wales-Beech Corporation) was pretty much limited to automotive OEM use of the period your car was built.

Of course, it's possible that this bolt was originally used for some other OEM application on your car or otherwise and, "along-the-way", found itself "transferred" to where you found it. I doubt that, though.

So, where to find another? Well, I expect that finding another exactly like this one will be tough. However, all you really need is a "WB" headmark bolt of 7/16-14 thread size and of about 2" length. You can add a separate lockwasher and grind a pointed end (if you wish) and no one will ever know the difference. Paragon has some "WB" headmark reproduction bolts, although I don't know if they have one of 7/16-14 X 2.

By the way, this bolt is in bad shape; I would not re-use it. In that case, all you need to obtain are a couple of matching non-trimmed ("indented") head bolts of 7/16-14 X 2" size with a period-correct headmarking.

[Joe M.]

Re: 1960 PG Bolt Identification

Paragon and CC list the bolt head with "UR" identification, but it shows it going into a 3 spd or 4 spd bracket, not a PG bracket.

Since the PG mounting bracket is only threaded at the top and there is no room at the top on one side to use a nut because there is interference from the speedometer cable ring, I believe the bolts insert from the bottom.

I really need the info that only a PG tranny-installed car can provide if they disassembled an unrestored car with PG and documented the bolts. Unless I read additional information, I will reuse what I believe is the original and an off-the shelf bolt.

[Joe M.]

Re: 1960 PG Bolt Identification

I would appreciate it if someone could look up part number 100149?

This is the bolt that holds the rear of the PG tranny to the bracket. I found it in Noland Adams book in the 1956-1957 section. The bolt was shown to insert from the bottom up just as I found the bolt on my 1960 PG.

[Joe L.]

Re: 1960 PG Bolt Identification

I would appreciate it if someone could look up part number 100149?

This is the bolt that holds the rear of the PG tranny to the bracket. I found it in Noland Adams book in the 1956-1957 section. The bolt was shown to insert from the bottom up just as I found the bolt on my 1960 PG.

Joe----

I can find no record of GM #100149 ever having been available in SERVICE. So, I have no information on it.

[Joe M.]

Re: 1960 PG Bolt Identification

Darn! I thought I was getting close to the answer. I found the bolt number on page 161 of Noland's book. Looks like a typical page out of AIM, but not sure if it is 1956 or 1957 AIM as the caption reads "overall view of '56-'57 Corvette PG." The good news is that I know that a 7/16"-14 x 2" bolt fits. I thought there might be a special name for the type of bolt associated with Part No. 100149. I am moving on to the next mystery. Thanks for all the input and searching.