9 1/4 Ratios

[Randall Miller]

Good day. I've searched and searched and only find muddy answers.

I do 4wd stuff and 3.54 is the lowest numeric ratio available.

The question... did Mopar cars have other ratios? There's a 68 Coronet Auto Rt for sale w a 9 1/4. Says is a 3.23.

I would've thought it to be an 8 3/4 but it is a 60. Did it come w a 60 as an auto and was 3.23 a real gear back then?

Thanks. Rudy

 

[gooser]

3.21 in 1979 chysler 300s i think the dc catalogs had listed up to 4.10s

 

[pnora]

Good day. I've searched and searched and only find muddy answers.

I do 4wd stuff and 3.54 is the lowest numeric ratio available.

The question... did Mopar cars have other ratios? There's a 68 Coronet Auto Rt for sale w a 9 1/4. Says is a 3.23.

I would've thought it to be an 8 3/4 but it is a 60. Did it come w a 60 as an auto and was 3.23 a real gear back then?

Thanks. Rudy

some 4x4 trucks with the 9 1/4 had 3.91 and 4.10

 

[gooser]

79 chysler 300s all had 3.21 gears in them

 

[RemCharger]

A Dana 60 is a 9 3/4. 3.54 was lowest numerical ratio offered.

 

[33 IMP]

The ONLY place to get a gear higher than a 3.54 for a dana 60 (lower, numerically) is from Dr Diff. He had 3.23s for a dana 60 specially made.
And a 9 1/4 and a dana 60 are entirely different rearends.

 

[RemCharger]

And then there's the Dana 53 9 1/4 with a 3.31... again a different animal.

 

[33 IMP]

@ Randall Miller, what rear do you actually have, and which direction are you trying to go?
IF you have a Mopar 9 1/4, summit has around 60 different gearsets for it, from 3.21 to 4.88 (at least) and lots in-between, including reverse rotations for front axles.

 

[33 IMP]

And then there's the Dana 53 9 1/4 with a 3.31... again a different animal.

... and a Dana 61, that looks just like a 60.... with 3.08 (or is it 3.07?).

 

[YY1]

Dakotas could have 3.92. Standard on R/T.

I've heard of special a order R/T with 3.19!

 

[Randall Miller]

A Dana 60 is a 9 3/4. 3.54 was lowest numerical ratio offered.

Thank you. Yes. 9 3/4. I run a 4wd shop. Calling it anything but a Dana 60 is weird to me.

 

[RemCharger]

Thank you. Yes. 9 3/4. I run a 4wd shop. Calling it anything but a Dana 60 is weird to me.

Chrysler only called them nine and three quarters. But I hear what you're saying.

 

[Thunderdan]

If you're looking for numerically lower numbers, the 9.25" diffs in the 70's C-body cop cars and '75-'78 Big block B-body cop cars had 2.71s and 3.21 as options, although a limited slip was only available in the 3.21s. Then again, good luck finding a those cop car parts as they are quickly climbing in value.

 

[eldubb440]

Dakotas could have 3.92. Standard on R/T.

I've heard of special a order R/T with 3.19!

my 02 Dakota has a 3:54 9 1/4......... both tires spin together, and it's tight as balls........ I'm gonna see how wide it is before any brain storming

 

[YY1]

I measured my Dakota and an 87 D100 with an 8 1/4.

The Dakota was wider!

 

[oldkimmer]

I have had 2.71 or 2.94 in a truck 9.25 as well as 3.21, 3.55,3.90. Kim