engine and drivetrain 4 Speed Output Flange Into 5 Speed

[71bmr02]

Will a 4 speed output flange fit the output shaft of a 245 getrag trans (assuming splines are the same)

Gale H

[thehackmechanic]

Yes. I've pulled four-eared flanges off four-speeds to replace the three-eared flange on a 245 to match the four-eared flange on a shortened driveshaft.

[71bmr02]

Thanks, I'm assuming it's the fine spline flange that works and not the coarse spline. I have four 4 speed trans laying around, any way to determine which may have the fine spline output shaft?

[jimk]

Thanks, I'm assuming it's the fine spline flange that works and not the coarse spline. I have four 4 speed trans laying around, any way to determine which may have the fine spline output shaft?

Take the flange off and look!

[71bmr02]

Thanks, The trans I have all have numbers stamped on the large flat, XXXX/4 or XXXX/6. I posted a question some time back to learn if anyone knows what the /4 and /6 designate and was hoping these numbers may correlate to coarse spline or fine spline. I'll know soon because I will down one each /4, /6 to see what splines they have. I'll post my findings.

[jgerock]

Gale,

 

If those numbers were stamped into the end cover of the trans, they are most likely Getrag casting part numbers.  Doubtful they would be helpful in determining the fine or course spline output shaft.  Your (4) transmissions could also have modified over the years with different parts.

 

Jim

[71bmr02]

Thanks, agreed and the only way to determine coarse spline or fine spline is to remove the output flange.

Gale

[71bmr02]

here is a pic of a trans with /6, /4 similar except for preceeding numbers

Edited January 15, 2014 by 71bmr02

[nbcbird]

It's been a while since I had my tranny out, but can't you simply remove the flange locking plate/nut and see the end of the output shaft? It's easy to tell the difference between the course/fine splines.  

[TobyB]

I have a vague recollection from about 1996 that the 5- speed fine flange is different than the 4- speed fine flange.

 

Tried it, it didn't work.  Don't remember why, didn't know enough then to figure out what I had. (as in, vintage of 4- speed)

 

So take it apart and see if I'm wrong!

 

t

[M3M3M3]

Take the flange off and look!

+1

[jgerock]

here is a pic of a trans with /6, /4 similar except for preceeding numbers

I think that is the serial number of the transmission.

This is what I thought you were referring to. Pics are from my 4 speed tranny removed from my 73tii

Believe this is a coarse spline output shaft (I could be wrong)

Date stamped possibly May 1971 inside the bellhousing

Serial number

Edited January 18, 2014 by jgerock

[71bmr02]

it's the number stamped into the flat in this case the 303546/4. I have a couple that end in xxxxx/6. i'll pull the retaining nut and check splines.

Gale

[jgerock]

Yes- I believe that is the serial number.

[71bmr02]

makes sense, the /4 and /6 may indicate run numbers, factory location etc. still going to check output splines.