Transmissions and Drivetrain Need help with your trans? Problems with your axle?

85 firebird bellhousing

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Old 10-31-2016, 06:40 PM
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Axle/Gears: 3:43 ls gotta be changed
85 firebird bellhousing

So I'm running a v6 t5 from an 85 firebird to a 350 2 piece rear main.need to know if I can use a stock 350 bellhousing.or what I need to bolt this granny up before I go buying shot I can't use thanks yall
Old 10-31-2016, 07:08 PM
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Re: 85 firebird bellhousing

Originally Posted by Josh F
So I'm running a v6 t5 from an 85 firebird to a 350 2 piece rear main.need to know if I can use a stock 350 bellhousing.or what I need to bolt this granny up before I go buying shot I can't use thanks yall
To mate a v6 t5 to a sbc you would need the sbc bellhousing. As well as the appropriate clutch and flywheel.
Old 10-31-2016, 08:24 PM
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Re: 85 firebird bellhousing

Since no 350 ever came in front of a T-5 in one of these cars, and the ONLY bell housings you can use are ones from these cars, don't go looking for a "stock 350 bell housing". There is no such thing that applies.

1-pc vs 2-pc RMS doesn't matter to the bell housing.

What DOES matter is, you will need a BH with the hydraulic provisions (84-up), from a V8. The only V8 that came with a T-5 was the 305. So, long story short answer, you need the BH out of a 84-92 305/T-5 Camaro or Firebird.

Then you'll discover why a 6-cyl transmission behind a V8 is a REALLY TERRIBLE idea from the get-go.
Old 10-31-2016, 11:26 PM
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Re: 85 firebird bellhousing

The block needs three holes for the starter. Two straight across from each other will be used; the diagonal two will not. The starter and flywheel for an 84 Z28 ar compatible with this.

Once you discover your really great DEAL from the 70s block only has the two diagonal bolt holes, you can drill and countersink the third hole so you can run thirdgen parts.

Or you can set up many other ways. None of which are as simple.

And yes, V6 ratios are miserable behind a V8.
Old 11-01-2016, 06:49 AM
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Car: 85 firebird 350 .30 over 650 Holly.
Engine: 355.rollers.650 Holley. Thumper.cam
Transmission: V6 14 spine t5 .wouldn't recommend
Axle/Gears: 3:43 ls gotta be changed
Re: 85 firebird bellhousing

So the block is from a 73 impala.im running a 153 tooth fly wheel.starter mates up fine.still trying to figure out the clutch set to use.not sure what you mean when your talking about the 3 holes?and so I absolutely have to use the v8 bellhousing from a third gen?
Old 11-01-2016, 08:06 AM
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Re: 85 firebird bellhousing

Originally Posted by Josh F
So the block is from a 73 impala.im running a 153 tooth fly wheel.starter mates up fine.still trying to figure out the clutch set to use.not sure what you mean when your talking about the 3 holes?and so I absolutely have to use the v8 bellhousing from a third gen?
Yes 84-94 V8 manual trans bellhousing also read this

https://www.thirdgen.org/forums/tran...t5-same-f.html

and this

https://www.thirdgen.org/forums/tran...endations.html
Old 11-01-2016, 06:57 PM
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Re: 85 firebird bellhousing

Use the clutch & flywheel for 83-85 L69. (Vin code G or 7, NOT Vin code H) Except you'll have to use a 6-cyl disc; I know ABSOLUTELY NOTHING WHATSOEVER about 6-cyls, never even seen one myself; but people say an Astro van disc works as right as anything can in a bastardization like that.
Old 11-01-2016, 08:20 PM
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Car: 85 firebird 350 .30 over 650 Holly.
Engine: 355.rollers.650 Holley. Thumper.cam
Transmission: V6 14 spine t5 .wouldn't recommend
Axle/Gears: 3:43 ls gotta be changed
Re: 85 firebird bellhousing

At thanks y'all for the help so.far I read the articles midias.now I'm trying to figure out all this back in forth of whether you have to trim the input shaft..and how much.and now "new to me" that you have to grind the pilot bearing down aswell?have not heard for sure what clutch set to use .besides the advanced.and the s10 which I don't have the

years to look for cause ain't got a diffinitive answer on that yet..o and what are the holes on the side.theres one below the distributor . of this intake for? Thanks
Old 11-04-2016, 10:29 PM
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Re: 85 firebird bellhousing

Accessory bracket support rods bolt to the sides. Under the dist. should be for the dist. hold down bracket bolt.
Old 11-07-2016, 10:44 AM
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Car: 85 firebird 350 .30 over 650 Holly.
Engine: 355.rollers.650 Holley. Thumper.cam
Transmission: V6 14 spine t5 .wouldn't recommend
Axle/Gears: 3:43 ls gotta be changed
Re: 85 firebird bellhousing

Thanks.so do I have to use a v8 clutch fork or can I use my v6 one?
Old 11-07-2016, 10:46 AM
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Re: 85 firebird bellhousing

Use the clutch fork that matches the bell housing. V8 fork for v8 housing

Last edited by midias; 11-07-2016 at 01:08 PM.
Old 11-07-2016, 12:44 PM
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Car: 85 firebird 350 .30 over 650 Holly.
Engine: 355.rollers.650 Holley. Thumper.cam
Transmission: V6 14 spine t5 .wouldn't recommend
Axle/Gears: 3:43 ls gotta be changed
Re: 85 firebird bellhousing

I'm using a v6 t5 with a v8 bh.so don't I have to use the v6 throw out bearing?
Old 11-07-2016, 01:08 PM
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Axle/Gears: 3.42 10 Bolt Posi
Re: 85 firebird bellhousing

The V6 and V8 use the same throwout bearing IIRC
Old 11-07-2016, 05:21 PM
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Re: 85 firebird bellhousing

TOB goes with the clutch you use.

Higher-performance clutches use a shorter one; typical 6-cyl type applications use a "raised diaphragm" clutch, which has less tension making it easier for the half of the population with generally less physical strength to use, and takes a MUCH taller one.

BH and trans don't matter to that. Not sure about the fork.




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