hey peeps, im trying to locate and find an economy geared 84 4 speed muncie..this local guy has an '84 fiero 4 speed.. but there is no rpo code stamped on it, and teh car it came outof has been scrapped.. the only numbers he could find printed on the bellhousing were:

614DWM

does this mean anything to anybody? how else can i tell what gearing this tranny has? i read about someone counting the input turns Vs the output turns.. could someone please explain this further in detail so i can get it right? ANY help would be appreciated. I know that with the performance 4 speed, the FD was 4.10:1, and the 4th gear was 0.81:1, for an overall gearing of 3.321:1. For the economy 4 speed, the FD was 3.32:1, and the 4th gear was 0.73:1, for an overall gearing of 2.424:1

also.. the position of the shift levers on the bellhousing, what do they need to be in to find 4th gear when counting the turns? does any body have a picture from a haynes manual perhaps?

if you have the trans just sitting there by itself then you can turn the input shaft and watch the diff/output
you should get roughly 2.4 turns to 1 turn if its an econo

quote Originally posted by Kohburn: if you have the trans just sitting there by itself then you can turn the input shaft and watch the diff/output you should get roughly 2.4 turns to 1 turn if its an econo

ok.. cool.. is it fairly easy to turn it in 4th gear by hand? also.. i need a diagram of where to set the shift and select levers so that it is in 4th gear... does any body have a scan of this? i remember seeinga picture in a haynes manual.. but i dont actually own one..

if you have a spare clutch disk laying around you can slide that over the splines and should be able to turn it

quote Originally posted by Kohburn: if you have a spare clutch disk laying around you can slide that over the splines and should be able to turn it

yeah.. no clutch disk handy.. now.. as to the position of the levers so i can put it in 4th gear..anybody have this picture from a repair manual?

i believe the 3-4 cluster is pushed in (down into the trans)
and 2,4 are rotated towards the rear of the car..

so down and back should

now i could have 3-4 backwards.. it is farely obvious which direction puts it into revers since it is spring loaded.. and is a non syncro gear (makes a loud clack when engaging)

kool, but i would still liek to have a diagram to go bye, to cover all bases...the guy lives an hour away, id hate to get there and have nothing have there be something wrong

quote Originally posted by Kohburn: i believe the 3-4 cluster is pushed in (down into the trans) and 2,4 are rotated towards the rear of the car.. so down and back should now i could have 3-4 backwards.. it is farely obvious which direction puts it into revers since it is spring loaded.. and is a non syncro gear (makes a loud clack when engaging)

It turns out that my tranny is a 4.10 it appears, my mistake was assuming that 4th was 1:1 when in fact it's not, being more like ~.8:1. I did some more looking at it tonight and figured it will be doing 65 mph at 3,000 RPM with 215/60-R14 tires, stock for many Fieros.

JazzMan

3000rpm at 65 is deffinately a 4.10

my old econo ran aeound 1800 at 60

If I'm not mistaken the economy final drive is 3.32:1 (?), 4th gear is 0.81:1 so the effective ratio would be

3.32 x .73 = 2.42 (economy '84)
4.10 x .81 = 3.32 (standard '84)
3.65 x .81 = 2.96 ('85-86 v6 muncie)

So for an economy trans, slightly less than 2 1/2 input shaft turns for one output shaft turn.

EDIT: Corrected per comments below. Learn something new everyday! Thanks!

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Three...make that four and counting...
84 2m8 in process (4.9)
86 GT SBC ???
85 GT 500 Eldo guts ??

[This message has been edited by 2m8 (edited 07-30-2004).]

2m8,

4th gear ratio in the econo trans is .73 which makes 2.42 to1 i/p to o/p.

Orville

quote Originally posted by Orville: 2m8, 4th gear ratio in the econo trans is .73 which makes 2.42 to1 i/p to o/p. Orville

That is correct.. i checked out that local fiero tranny.. NO luck.. it was a performance 4 speed...approximately 3.3 input turns to 1 output turn in 4th gear.

quote Originally posted by aaronrus: That is correct.. i checked out that local fiero tranny.. NO luck.. it was a performance 4 speed...approximately 3.3 input turns to 1 output turn in 4th gear.

If the fiero is an 84 and it does not have the SE printed on the sail panel, then it will be equiped with the econo geared 4 speed.

quote Originally posted by v8fiero400: If the fiero is an 84 and it does not have the SE printed on the sail panel, then it will be equiped with the econo geared 4 speed.

word? that would be way too easy.uiop

[This message has been edited by lurker (edited 07-31-2004).]

I believe the econo axle is 3:18 and is option code F75 available 84-86. If you find a car with that RPO code in a yard you're all set.

Edit: That info was from an RPO list, but looking at the 22P it says that is the MD9 Auto final drive . The 2 ratios listed for the 4 speed are 3:32 and 4:10. " They all can be ID'ed by either a plate on the side of the case, a stamping number on the governor case or an ink stamp on the bell housing". The MD9 is PF, the MY8 (econo) is either NA or DJ and the M19 (4:10) is UM or DW.

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Notchbacks RULE

"It's cool to have a car you just have to look back at."

[This message has been edited by Fierobruiser (edited 07-31-2004).]

quote Originally posted by v8fiero400: If the fiero is an 84 and it does not have the SE printed on the sail panel, then it will be equiped with the econo geared 4 speed.

thats incorrect.. there was the coupe, the sport coupe, and then the SE. only the coupe had the econo 4 speed manual. only 7099 of them made

quote Originally posted by aaronrus: thats incorrect.. there was the coupe, the sport coupe, and then the SE. only the coupe had the econo 4 speed manual. only 7099 of them made

Oooops, my bad. I forgot about the middle of the line sport coupe. How can you tell the difference from a coupe and sports coupe?

I concur, See my quickly added edit above. BTW there are different ratios listed for the auto 3.18 (84-86), PF or 6PF, 3.06 (85-86) CD or 6CD, 3.33 (87-88) 7CPC or 8CPC, and 2.84 (87-88) 7PSC and 8 PSC.
On the subject of transmissions, has anyone ever seen a Getrag MG3 trans that is listed as used in 87 along with the MG2 listed as 86-88?

quote Originally posted by v8fiero400: Oooops, my bad. I forgot about the middle of the line sport coupe. How can you tell the difference from a coupe and sports coupe?

Not positive, but I think the VIN# on the base Coupe is 1G2PM, the Sport Coupe is 1G2AM, and the SE is 1G2PP.

quote Originally posted by Fierobruiser: Not positive, but I think the VIN# on the base Coupe is 1G2PM, the Sport Coupe is 1G2AM, and the SE is 1G2PP.

the base coupe with the economy 4 speed tranny has a 5th digit of "E" , not M

Since there were so few made----wouldn't it be possible to change the final gear ratio to get what you wanted?

quote Originally posted by jeffndebrus: Since there were so few made----wouldn't it be possible to change the final gear ratio to get what you wanted?

that is what im doing.. finding one so i can swap in ther 4th gear and final drive from the econo tranny into my v6 fiero 4 speed..the 1st gear in the v6 fiero 4 speed is taller.. so it will give better grip to the track off the line when i put the 4.9L caddy v8 in it

Sounds like fun, I went with the 4t60e/4.9 combo.

The isuzu ratio is 2.48.

Orville

quote Originally posted by jeffndebrus: How does the final econo 4 spd ratio compare to the isuzu 5spd final ratio?

they are VERY close:

2.48:1 for the 5 speed izuzu
2.42:1 for the 4 speed econo muncie

so i got an econ trans i am willing to sell. just pm if you want it

\

quote Originally posted by F8: so i got an econ trans i am willing to sell. just pm if you want it \

PM sent

is there a way i can tell my the RPO numbers that i could have a econo 4-speed? i have an 86se v6 4speed.

thanks,

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" DRIVE IT LIKE YOU LOVE IT"

quote Originally posted by ohio86se: is there a way i can tell my the RPO numbers that i could have a econo 4-speed? i have an 86se v6 4speed. thanks,

the fifth digit in yoru VIN number will be "E"