Dana/Spicer 3.08 rear end in a 48?
Still gradually doing my homework as to what rear end I want to put in.
Would a 3.08 be too low a ratio for my '48 Super Six? I'm running a 308 flathead, so I'll bet I have the power. Just wondering how it will perform at lower speeds.
Anyone in the California Bay Area have a rear end to sell?
-Chris
Would a 3.08 be too low a ratio for my '48 Super Six? I'm running a 308 flathead, so I'll bet I have the power. Just wondering how it will perform at lower speeds.
Anyone in the California Bay Area have a rear end to sell?
-Chris
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Comments
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I have a 3.07 Spicer Rear and its perfect for a Hydro Hornet.
However I feel a standerd shift should have a 4.10. There are variables to consider such as flat or hilly terrain to consider a higher or lower Ratio.0 -
Ol racer wrote:I have a 3.07 Spicer Rear and its perfect for a Hydro Hornet.
However I feel a standerd shift should have a 4.10. There are variables to consider such as flat or hilly terrain to consider a higher or lower Ratio.
True. Buy my typical driving area consists of freeways and realtively flat terrain.
Now, will I have difficulty climbing hills in San Francisco in first gear?
-Chris0 -
I've had a 3.08 under my 1949SSClCp for many years and am completely satisfied with it! 308, TwinH, Clifford header and standard 3 speed. Have had NO problems with CA hills and/or freeways. 308 seems to have plenty enough torque to pull higher gear than 4.1.
Speedo reads abour 25% slow because I haven't changed the drive gear, but cruising 65-70 mph is a dream compared to old 4.1.
p.s.: My wife and I changed the r/e in our garage with only jack stands and a floor jack in about two hours, as I recall.0 -
Hi I Too Have The Later 307 Spicer Rear End In My 50 Pacemaker Cv I Cheated A Bit I Was Woried About Clutch Damage From The Lower Gear So I Used A 48,49 8cyl. 1st Gear (it Is A Lower Gear Than The 6 ) The Car Pulls Out Nice And I Can Run 70-75 With No Trouble At All It Saves On Gas And Makes The Car A Nicer Ride I Do Not Have Over Drive Just Straight 3 Speed I Feel The Way I Went I Have Less To Break ( No Overdrive And No Elect.to RUn It)0
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Chris, I'd give it a try with the 3.07 and see how it feels. If it's a bit tough on the startouts with a little incline as my '51 C8 was with the 3.07, you can change out the gears for 3.31 or something near that. That's the beauty of the later axle ... quite a few different ratios available.0
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usgrant7 wrote:
Put that 3-08 gear ratio in your car and enjoy cruising at 70 and low gear will pull you from any starts. The Hornet engine is made to be a torque engine. I put 2-73 gears in my Hornet, replaced the 3-08, and can't tell the difference driving across this country. Walt.Still gradually doing my homework as to what rear end I want to put in.
Would a 3.08 be too low a ratio for my '48 Super Six? I'm running a 308 flathead, so I'll bet I have the power. Just wondering how it will perform at lower speeds.
Anyone in the California Bay Area have a rear end to sell?
-Chris0 -
My discomfort with starting out on a good uphill slope with the 3.07 wasn't a matter of engine power, it was the amount of clutch slipping necessary to get going smoothly.0
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Thanks everyone. This sounds like a plan.
-Chris0 -
bigboy308 wrote:
p.s.: My wife and I changed the r/e in our garage with only jack stands and a floor jack in about two hours, as I recall.
Wow. Did you change out axles, drums, etc, or just the differential itself? 2 hours, impressive.
Any tricks I should know before doing this myself? I have the shop manual. Does it cover this procedure?
-Chris0 -
bigboy308 wrote:
I hope you used the 3-08 U bolts and shock plate. Walt.I've had a 3.08 under my 1949SSClCp for many years and am completely satisfied with it! 308, TwinH, Clifford header and standard 3 speed. Have had NO problems with CA hills and/or freeways. 308 seems to have plenty enough torque to pull higher gear than 4.1.
Speedo reads abour 25% slow because I haven't changed the drive gear, but cruising 65-70 mph is a dream compared to old 4.1.
p.s.: My wife and I changed the r/e in our garage with only jack stands and a floor jack in about two hours, as I recall.0 -
Chris,
I have a 1949 Super Six with 262 engine. Came with 4:11 & standard 3 speed. terrible to drive at highway speeds. Changed to overdrive = much better. Then changed rear end to 3:07 (took from a 1954 hornet with automatic trans)
Now run great at most speeds. Flat interstate driving = 70 & 75 OK if no head wind. But gear ratio is a little to "tall" for the 262 engine . But can kick down from overdrive when needed& maintain traffic speed.
If you have same set up with Hornet engine I think you will be very happy.
good luck. Kerry Patchett0 -
KerryP wrote:Chris,
I have a 1949 Super Six with 262 engine. Came with 4:11 & standard 3 speed. terrible to drive at highway speeds. Changed to overdrive = much better. Then changed rear end to 3:07 (took from a 1954 hornet with automatic trans)
Now run great at most speeds. Flat interstate driving = 70 & 75 OK if no head wind. But gear ratio is a little to "tall" for the 262 engine . But can kick down from overdrive when needed& maintain traffic speed.
If you have same set up with Hornet engine I think you will be very happy.
good luck. Kerry Patchett
This 3.08 sounds like the deal for my '49 c8. As is, 1st gear is only good up to about 10 mph and I shift to high at about 20 mph. Where does one get the 3.08 gears that will fit in my c8?0 -
Marker345 wrote:This 3.08 sounds like the deal for my '49 c8. As is, 1st gear is only good up to about 10 mph and I shift to high at about 20 mph. Where does one get the 3.08 gears that will fit in my c8?
You have to swap the whole rear-end from the later model '53/'54 stepdowns with dual range hydramatic. Its the familiar Dana44 type rear end. All the brake hardware will swap, with the exception of the backing plate that bolts onto the rear end housing.
Like Walt recommends, use the late model rearend's shock plate and U-bolts (preferably new U-bolts of the same size as was removed from the Dana).
We also run this high gear rearend with a standard, single lever transmission and like it. In one of these previous discussions, someone recommended running the larger 10" Hornet clutch which is also a wise choice.
Mark0
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