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 Post subject: Gearbox - advice please.
PostPosted:Sat Aug 13, 2011 10:35 pm 
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Big Block

Joined:Thu Mar 03, 2011 7:20 pm
Posts:124
Car Details:!967 First Generation - Silhouette!
I'm considering taking out a 4 speed manual Muncie from my first Gen and putting in a Powre glide or maybe a TH350, is it pretty streight forward? Or does anything need altering (apart from shifter linkage and clutch obviously)
Any advice apreciated, thanks.
Russ.


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Gearbox - advice please.

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PostPosted:Sat Aug 13, 2011 11:30 pm 
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Big Block

Joined:Mon Oct 05, 2009 10:00 pm
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Car Details:tube framed 68 camaro
Location:WHITEHAVEN, CUMBRIA
provided you get a pedal box from an auto, it's an easy swap, .....i went from a T10 manual 4 speed to a th350 in my old 1978 Z28, piece of piss really.




The question i want to ask is.......WHY ??????

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PostPosted:Sat Aug 13, 2011 11:59 pm 
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Big Block

Joined:Thu Mar 03, 2011 7:20 pm
Posts:124
Car Details:!967 First Generation - Silhouette!
Ease of drive, bit quicker, better mpg, all that I guess, (perhaps not the last), but as its got 4:11 gears in the back end with 10x15's its racin its nuts off at 60 - 70. Open to advice, just want to get the revs down a bit at 60 - 70 without swapping the diff / axle, love the launch!! :thumbup:


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PostPosted:Sun Aug 14, 2011 10:09 am 
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Big Block

Joined:Mon Oct 05, 2009 10:00 pm
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Car Details:tube framed 68 camaro
Location:WHITEHAVEN, CUMBRIA
Quote:
Ease of drive, bit quicker, better mpg, all that I guess, (perhaps not the last), but as its got 4:11 gears in the back end with 10x15's its racin its nuts off at 60 - 70. Open to advice, just want to get the revs down a bit at 60 - 70 without swapping the diff / axle, love the launch!! :thumbup:
changing to an auto won't lower the cruising revs, if you have 4.11 gears in the axle, you will be in top gear with either box (1:1 drive)

if you dont want to change the diff, and are determined to get an auto box, try a late model one with on overdriven top gear.......better yet , if you are prepared to change the box, put in a 5 speed (or even a 6 speed) from a corvette or late model camaro, as 4th gear will be 1:1 drive, with 5th and 6th being overdriven, thus lowering the revs.
The advantage of this swap is that you dont have to mess with the cars history too much. :thumbup:

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PostPosted:Sun Aug 14, 2011 12:25 pm 
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Big Block
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Joined:Fri Mar 19, 2010 1:35 am
Posts:2566
Car Details:79' camaro road & track day toy. 383 stroker, 5 speed TKO trans, lots of suspension stuff, 13" Vette brakes, 18" wheels.
Location:Luton
Putting in a 5 speed manual would be the way to go, you'll get the best of all worlds then.. !!!

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PostPosted:Sun Aug 14, 2011 9:41 pm 
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Big Block

Joined:Sat Oct 30, 2010 9:56 pm
Posts:268
Car Details:hi i have had my 70 z28 for bowt 5years now when i got it it needed a full resto an now am finaly geting to the end just have a few more bits to find and i cant wait till shes dne.
Location:north east
hi if you do go through with the change do you want to sell the muncie as iam trying to find 1 for my 70 as it should be a manual car but couldnt get 1 so i put a th350 in it let me know thanks shaun :thumbup:


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PostPosted:Sun Aug 14, 2011 11:12 pm 
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Big Block

Joined:Thu Mar 03, 2011 7:20 pm
Posts:124
Car Details:!967 First Generation - Silhouette!
Hi, no i'll be keeping the Muncie its part of the cars history, itll be cleaned bagged and stored. Thanks anyway.
Russ.


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PostPosted:Sun Aug 14, 2011 11:13 pm 
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Big Block

Joined:Thu Mar 03, 2011 7:20 pm
Posts:124
Car Details:!967 First Generation - Silhouette!
Quote:
Quote:
Ease of drive, bit quicker, better mpg, all that I guess, (perhaps not the last), but as its got 4:11 gears in the back end with 10x15's its racin its nuts off at 60 - 70. Open to advice, just want to get the revs down a bit at 60 - 70 without swapping the diff / axle, love the launch!! :thumbup:
changing to an auto won't lower the cruising revs, if you have 4.11 gears in the axle, you will be in top gear with either box (1:1 drive)

if you dont want to change the diff, and are determined to get an auto box, try a late model one with on overdriven top gear.......better yet , if you are prepared to change the box, put in a 5 speed (or even a 6 speed) from a corvette or late model camaro, as 4th gear will be 1:1 drive, with 5th and 6th being overdriven, thus lowering the revs.
The advantage of this swap is that you dont have to mess with the cars history too much. :thumbup:
Would a 5 or 6 speed fit streight in? If so what year vetts am i looking for. Thanks for that there aint no substitute for knowledge.
Russ.


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PostPosted:Mon Aug 15, 2011 5:48 am 
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Big Block

Joined:Mon Oct 05, 2009 10:00 pm
Posts:122
Car Details:tube framed 68 camaro
Location:WHITEHAVEN, CUMBRIA
Quote:

Would a 5 or 6 speed fit streight in? If so what year vetts am i looking for. Thanks for that there aint no substitute for knowledge.
Russ.
the t5 box (5 speed), should go in with no problems, possibly the shifter position needing altered,(you can change the tailshaft though as camaro's/firebirds have the shifter towards the back of the box, c10 trucks have it in the middle (or have i got that backwards?), also, the fox body mustangs use a t5 box, although the bell housing is obviousely different.
most 3rd gens, and i believe 4th gens use the t5, the 6 speed is 4th gen onwards.
I don't know how straightforward the 6 speed would be to swap in though :?

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PostPosted:Mon Aug 15, 2011 1:40 pm 
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Big Block

Joined:Mon Dec 22, 2008 10:53 am
Posts:306
Car Details:'68 Camaro
'89 Golf Rallye
'97 Golf GTi (Daily)
Location:SE London/Kent
You need to consider what engine you have and what sort of power/torque you will subject the gearbox to, and how you drive the car. If it's fairly standard (and I get that impression from you wanting to keep the Muncie), then a T5 should be ok.

The next problem you may have, as mentioned, is the shifter location, which could mean cutting another hole in the tunnel. With an auto, you just need a hole for the shifter cable, which is less intrusive, and a change to the shifter insert of the centre console (if you have one).

How about an overdrive unit for the Muncie? They are expensive, but could be an easier solution:

http://www.gearvendors.com

and as already said, manual to auto - WHY? If you are set on going auto, I have a TH350 I'm looking to get rid of soon (as I'm converting to manual - :lol: ) Forget going for a Powerglide, just not enough gears - great for drag racing though!

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