Late 70's Parts Book

[Michael H.]

Does anyone happen to have a later 70's or early 80's parts book handy? Need the last available part number for a 57-63 Borg Warner sycronizer ring in group 4.383. My newest book (73) still lists the old original number, 3709348 but I believe the newest number was 360812? Thanks.

[Gary C.]

83 P&A shows 3845039 55-65, 3859027 66-70 *NM*

[Michael H.]

Re: 83 P&A shows 3845039 55-65, 3859027 66-70

Thanks Gary, but, are you sure that's from the 4-speed section? Those numbers almost sound like 3-speed. In fact, if it shows 55, it must be for 3-speed.

[Norm C.]

From P&I Corvette Catalog 53-82 with

effective date December 83 shows: 57-63 Y W/Warner RING, BLOCKING (2 13/16 I.D. X 3 7/32 O.D. W/3 Inside Slots) still lists the same number you have
3709348 hope this help!!

[Michael H.]

Re: From P&I Corvette Catalog 53-82 with

Thanks Norm. It must have changed later than that printing. If indeed it did change to the 360812, then there's a problem that all owners of 57-63 B-W 4-speed car owners should know about.

[Art A.]

Re: Late 70's Parts Book

Michael, My 1953-80, dated Sept 1979, C/B PC shows lists 3845202 (.31) Retainer (2 3/32 I.D.) for 55-65MY, And 3845039 (6.15) Ring 2 3/32 O.D. at small end for 55-65 MY. And 3859027 AR (10.75) Ring, Blocking.

Art

[Joe L.]

Re: Late 70's Parts Book

Michael-----

The GM #3709348 blocking ring was discontinued from SERVICE in August, 1984 and replaced by the GM #360812. However, the 360812 had been available in SERVICE since late 1974. It was the original blocking ring used for 1975+ Borg Warner 4 speeds used in Corvettes from that time through 1981. It's also used in the Doug Nash "4+3" transmission used for 1984 through 1988 in Corvettes.

The GM #360812 is still available from GM in SERVICE-----for about 65 bucks each, GM list.

[Michael H.]

Re: Late 70's Parts Book

Thanks Joe. That's exactly what I thought. Now I can post the problem involved when replacing the 3709348 with the 360812.

[Michael H.]

Re: Late 70's Parts Book

Thanks Art. The numbers sound like those used for 3-speed transmissions, especially the MY usage. (55-65)

The original 3709348 must have also been used for some 1955 3-speed application by it's numerical value, but not Corvette. That would be about right for a number in that range.