240 rear gear

[gdking11]

can anyone tell me what i need to be concerned with when changing a standard 79 8.25 2.40 rear gear to 4.56? Thanks

 

[WP29440SE]

a 2.4 rear gear? im pretty sure the highest was a 2.76 ,but any way i would be looking at an 8 3/4 for that kind of ratio. 8 1/4 rears are not exactly the greatest for performance . i didnt know you could get a 4.56 ring and pinion for an 8 1/4

 

[rumblefish360]

No, there was the 2.45 ratio,.

The carrier will need to be changed to a carrier from a higher gear ratio, the 2.76 carrier will do. However,a new suregrip unit is around $300 IIRC, or last I seen.

 

[gdking11]

so the 4.56 won't work out of the box?

 

[rumblefish360]

I do think that is what I said, read the above post. ;)

 

[WP29440SE]

why are you wanting a 456 gear. are you building a door slammer cordoba? wheres the pics

 

[gdking11]

79 magnum...oval track car. Can't get quite enough revs with gear ratio. i'll see what i can do about pics

 

[guitarguy]

Main thing to worry about is ending up in the back seat after you romp on it the first time after the swap. :headbang:

 

[Citrus1973]

I just got my 'Doba back today from having gears installed. I purchased a used sure grip including 3.90 gear set off ebay. It reall y has made a big improvement. I had 2.7 gears original. Now to make this wretched 318 breath...

 

[m79ded]

100% agree with SUPER77SE 8.75 is the way to go just get rid of 8.25.
And besides when you will want to change gears for different tracks it is a real breeze just swaping the center section.