4 speed questions // pictures?
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4 speed questions // pictures?
I'm in the process of doing a manual transmission swap in my 1973 El Camino and I have some questions.
- Is the pedal hanger bracket up under the dash the same on both automatic and manual transmission?
- Can anyone please post some detail information of the whole 4 speed pedal assembly with the hanger braket and a picture of where the clutch rod goes trough the fire wall?
I will be doing this conversion with a Tremec TKO 600 5 speed transmission and a hydraulic release bearing so I do not need fiddle around with the whole OE mechanical clutch linkage but pictures of the OE set up would be a great help anyway.
- Is the pedal hanger bracket up under the dash the same on both automatic and manual transmission?
- Can anyone please post some detail information of the whole 4 speed pedal assembly with the hanger braket and a picture of where the clutch rod goes trough the fire wall?
I will be doing this conversion with a Tremec TKO 600 5 speed transmission and a hydraulic release bearing so I do not need fiddle around with the whole OE mechanical clutch linkage but pictures of the OE set up would be a great help anyway.
Elkyerik- G3GM Newbie
- Street Cred : 2
Re: 4 speed questions // pictures?
All you need is a longer bolt, the clutch pedal bolts to the outside of the bracket.
JF74chevelle- G3GM Member
- Street Cred : 0
Re: 4 speed questions // pictures?
The clutch push rod comes through the firewall below the throttle cable eixt. Its marked on the firewall. Since you are doing a conversion, keep the hole you drill small and use a 70-81 camaro bellows boot. A stock 73-74 boot is unavailable and has a much larger bolt spacing than the camaros. Much easier to access for drilling if you remove the drivers fender well.
Joe73- Donating Member
- Street Cred : 83
Re: 4 speed questions // pictures?
What od ratio are you going with? .82 or .64.
JF74chevelle- G3GM Member
- Street Cred : 0
Re: 4 speed questions // pictures?
No of in mine. I have the factory 4 speed. All saginaws, muncies, turbo 350 and 400 are all 1:1 final ratio. A 700r4 is .70 final of remember correctly for comparison.
Joe73- Donating Member
- Street Cred : 83
Re: 4 speed questions // pictures?
Joe73 wrote:No of in mine. Â I have the factory 4 speed. Â All saginaws, muncies, turbo 350 and 400 are all 1:1 final ratio. Â A 700r4 is .70 final of remember correctly for comparison.
Sorry joe, I should clarified. I am running a Muncie as well but I’m looking at going to an OD manual soon. I was asking Erik to see what OD ratio he was going for because the .64 is really steep.
JF74chevelle- G3GM Member
- Street Cred : 0
Re: 4 speed questions // pictures?
I used this website calculator to figure out some differences. Looks like having a 5 speed vs. a 4 speed AUTO would lower your final rpm by about 200 rpm. Not much of a difference at all. I'd just like to see that your final rpm is somewhat within the engines built power band so it doesnt lug.
Joe73- Donating Member
- Street Cred : 83
Re: 4 speed questions // pictures?
https://www.crawlpedia.com/rpm_gear_calculator.htm
That is the rpm calculator I found to be most accurate.
That is the rpm calculator I found to be most accurate.
JF74chevelle- G3GM Member
- Street Cred : 0
G3GM :: G3 Tech :: Engine & Driveline
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