904/500 low gear set interchange???
#594484
01/26/10 01:48 PM
01/26/10 01:48 PM
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Joined: Apr 2008
Posts: 148
Spring Grove, PA, US
Mr.Mopar
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Posts: 148
Spring Grove, PA, US
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I went to the junkyard today, and came across a A500 trans laying in the back of a ramcharger, and i didnt think about it till i got home.. would the low gear set out of a 90's A500 fit a 70's A904 trans?? it would be awesome to have that extra gear pulling out 
1996 cummins diesel ext cab, long bed
1966 Valiant 4dr(318- 3.55gears, 13.31@ 102mph),
1974 Duster(360- 13.63@ 99.96 w/3.23 gears),
1933 Dodge DP (201)
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Re: 904/500 low gear set interchange???
[Re: Mr.Mopar]
#594485
01/26/10 11:12 PM
01/26/10 11:12 PM
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Joined: Oct 2009
Posts: 276
Temecula, Ca.
zzyzxpat
enthusiast
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enthusiast
Joined: Oct 2009
Posts: 276
Temecula, Ca.
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You will never notice the difference.
" The last official act of any goverment, is to loot the treasury" George Washington
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Re: 904/500 low gear set interchange???
[Re: Mr.Mopar]
#594487
01/27/10 09:47 AM
01/27/10 09:47 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
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Posts: 16,123
Grand Haven, MI
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they should, I think you may need the drum from the LG tranny, too...Hopefully John Kunkel will chime in...he seems to be the answer man for torqueflights.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: 904/500 low gear set interchange???
[Re: Mr.Mopar]
#594488
01/27/10 09:53 AM
01/27/10 09:53 AM
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Joined: Oct 2009
Posts: 276
Temecula, Ca.
zzyzxpat
enthusiast
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enthusiast
Joined: Oct 2009
Posts: 276
Temecula, Ca.
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Yes the parts will fit. You need the front ring gear and hub assy, the front planet, and the sun gear/shell assy. It's a drop in replacement.
I am sure changing gears in the diff did change your E.T. That changes the RPM throughout the entire range. Changing the gears in the trans changes 1st gear ratio only.
" The last official act of any goverment, is to loot the treasury" George Washington
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Re: 904/500 low gear set interchange???
[Re: zzyzxpat]
#594489
01/27/10 10:34 AM
01/27/10 10:34 AM
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Joined: Aug 2003
Posts: 11,179
Atco NJ
DJVCuda
I Live Here
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I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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Quote:
Yes the parts will fit. You need the front ring gear and hub assy, the front planet, and the sun gear/shell assy. It's a drop in replacement.
I am sure changing gears in the diff did change your E.T. That changes the RPM throughout the entire range. Changing the gears in the trans changes 1st gear ratio only.
that is incorrect - it changes 1 & 2
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Re: 904/500 low gear set interchange???
[Re: DJVCuda]
#594490
01/27/10 01:26 PM
01/27/10 01:26 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
Yes the parts will fit. You need the front ring gear and hub assy, the front planet, and the sun gear/shell assy. It's a drop in replacement.
I am sure changing gears in the diff did change your E.T. That changes the RPM throughout the entire range. Changing the gears in the trans changes 1st gear ratio only.
that is incorrect - it changes 1 & 2
yup, older 904's are 2.45/1.45/direct, newer ones are 2.74/1.54/direct
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: 904/500 low gear set interchange???
[Re: patrick]
#594491
01/27/10 03:18 PM
01/27/10 03:18 PM
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Joined: Aug 2003
Posts: 11,179
Atco NJ
DJVCuda
I Live Here
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I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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Re: 904/500 low gear set interchange???
[Re: Dakota_Don]
#594493
01/27/10 04:13 PM
01/27/10 04:13 PM
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Joined: Sep 2004
Posts: 1,828
houston texas
gremlinsteve
top fuel
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top fuel
Joined: Sep 2004
Posts: 1,828
houston texas
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the 999 amc wil also interchange.
steve
if You Like Gremlinsteve. Gremlinsteve Likes You.
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Re: 904/500 low gear set interchange???
[Re: Dakota_Don]
#594494
01/27/10 06:14 PM
01/27/10 06:14 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
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Posts: 16,123
Grand Haven, MI
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Quote:
ok so lets do some math, if he has a 904 with 3.23 gears and he adds the lower gear set to this trans, what would be his new first and second drive ratio, then for kicks add the a500 OD final ratio, lets keep everything equal.
math is easy...2.74*3.23=8.8502
8.8502/2.45= 3.61
so overall 1st gear will act like it's a standard trans with a 3.61 rear.
do the same math for 2nd if you're curious.
3.23*0.69 = 2.23, or overall gearing like 3rd in a late model M (which used 2.21 gears mainly)
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: 904/500 low gear set interchange???
[Re: Mr.Mopar]
#594495
01/27/10 06:14 PM
01/27/10 06:14 PM
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Joined: Apr 2008
Posts: 148
Spring Grove, PA, US
Mr.Mopar
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OP
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Joined: Apr 2008
Posts: 148
Spring Grove, PA, US
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glad to hear the parts should work!  I'll try to get them this weekend. And i did know that it only changes first and second. I just think it would be nice to have basically an "extra" gear in fisrt for pulling out at the track, then on the street your 3rd gear is still the same.
1996 cummins diesel ext cab, long bed
1966 Valiant 4dr(318- 3.55gears, 13.31@ 102mph),
1974 Duster(360- 13.63@ 99.96 w/3.23 gears),
1933 Dodge DP (201)
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