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Bellhousing bolt thread

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Angelo Voltura

Bellhousing bolt thread

I'm limited in transportation and my dumb self forgot to bring my bolts home from my storage unit when I removed my transmission.

351M bellhousing bolts are 7/16x14 correct? I know there are 2 different lengths as well. I'm replacing them with stainless grade 8s and would just like some confirmation.

Thanks guys.

1978 F150 351W
1979 F150 "410M"
1979 F100 302
1979 F250 400
1987 F150 300
1990 F150 302
1991 F150 300
1995 F150 (1985 clip swapped) 300
1997 F250 351W

ArdWrknTrk

Re: Bellhousing bolt thread

Administrator

Good morning Angelo!

Yup, almost all Ford bell bolts are 7/16-14 up until they went metric.

I'm not sure if my 460 bell is going to be the same as a 335 bell because the M/400 was never made hydraulic.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Gary Lewis

Re: Bellhousing bolt thread

Administrator

The length is to some extent determined by the transmission. I noticed on the ZF5 that the bolts have to be longer than on the T19 due to the thickness of the flange on the bell.

So, do you need the lengths? I can't find them in the MPC, so I don't know what to tell you. I have some, but don't know for sure what transmission they are from. I can measure them though if you need it.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

Angelo Voltura

Re: Bellhousing bolt thread

That's what I thought, thanks guys.

The lengths would be nice. Using a C6 trans. The top 2 were shorter than the bottom 4. Everything online says the C6 should all be the same though.

1978 F150 351W
1979 F150 "410M"
1979 F100 302
1979 F250 400
1987 F150 300
1990 F150 302
1991 F150 300
1995 F150 (1985 clip swapped) 300
1997 F250 351W

Gary Lewis

Re: Bellhousing bolt thread

Administrator

I have 11 of them in a baggie and they are all 2" long. So, I think the average is probably 2.0000".

Gary, AKA "Gary fellow": Profile

Angelo Voltura

Re: Bellhousing bolt thread

Thank you sir!!

1978 F150 351W
1979 F150 "410M"
1979 F100 302
1979 F250 400
1987 F150 300
1990 F150 302
1991 F150 300
1995 F150 (1985 clip swapped) 300
1997 F250 351W