what dana in a auto 85?
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From: Athens AL
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Re: what dana in a auto 85? (devilfish)
if it was an auto it was a Dana 36. Performance/Z51 axle was prolly 3.07s
Otherwise it was a 2.59
Otherwise it was a 2.59
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From: Santa Rosa CA
Re: what dana in a auto 85? (devilfish)
It's a shame you don't have your RPO sheet :-(
I'm not certain about the 85, but my 86 with auto, z51, and 3.07 has a Dana 44. The item "G44" appearining on my RPO sheet indicates this. Does this mean that all 3.07's are Dana 44? I don't really know, but if you search, there are a few web sites out there that give detailed RPO codes for our cars. The "Black Book" only has a cursory listing.
Standard gearing for the 85 auto was 2.73, with 3.07 available as RPO option G92. All manual equipped cars were 3.07.
Good Luck,
Jim
[Modified by graemus, 9:40 AM 3/1/2002]
I'm not certain about the 85, but my 86 with auto, z51, and 3.07 has a Dana 44. The item "G44" appearining on my RPO sheet indicates this. Does this mean that all 3.07's are Dana 44? I don't really know, but if you search, there are a few web sites out there that give detailed RPO codes for our cars. The "Black Book" only has a cursory listing.
Standard gearing for the 85 auto was 2.73, with 3.07 available as RPO option G92. All manual equipped cars were 3.07.
Good Luck,
Jim
[Modified by graemus, 9:40 AM 3/1/2002]
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Re: what dana in a auto 85? (graemus)
I'm not certain about the 85, but my 86 with auto, z51, and 3.07 has a Dana 44. The item "G44" appearining on my RPO sheet indicates this. Does this mean that all 3.07's are Dana 44? I don't really know, but if you search, there are a few web sites out there that give detailed RPO codes for our cars. The "Black Book" only has a cursory listing.
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From: Santa Rosa CA
Re: what dana in a auto 85? (vader86)
OK, I stand corrected. Apparently the hobbiest web site I got that RPO from was wrong. Here however, is an excerpt from the TPIS website that's some good stuff.
Dana 36 axles Dana 44 axles
Ratio RPO Ratio RPO
2.59 GM1 3.07 G87
2.73 GU2 3.33 GT7
3.07 G44 3.45 GM3
3.31 GW4 3.54 GH0
Jim
Dana 36 axles Dana 44 axles
Ratio RPO Ratio RPO
2.59 GM1 3.07 G87
2.73 GU2 3.33 GT7
3.07 G44 3.45 GM3
3.31 GW4 3.54 GH0
Jim
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Re: what dana in a auto 85? (graemus)
graemus,
Even your own chart (if it were correct) contrdicts what you said.
I inserted the dots to better separate the numbers for ease of reading. Your chart shows the G44 to be a 3.07 ratio in a Dana 36 axle. Not the Dana 44 you thought you had. According to this chart a code G87 would be a 44 axle with 3.07 ratio. What made you think you had a 44 after looking at this chart? In actuallity, the ratio codes do not indicate the axle model. Ignoring the the mis-labling of the columns, all of these ratios ARE correct, except for one. G87 does NOT designate any particular ratio. G87 is "Gear, Ring 8.50 Inch". To someone that knows that the Dana 44 has an 8 & 1/2" ring gear, G87 means Dana 44.
Even your own chart (if it were correct) contrdicts what you said.
Dana 36 axles..................Dana 44 axles
Ratio RPO......................Ratio RPO
2.59 GM1......................3.07 G87
2.73 GU2......................3.33 GT7
3.07 G44......................3.45 GM3
3.31 GW4.....................3.54 GH0
Ratio RPO......................Ratio RPO
2.59 GM1......................3.07 G87
2.73 GU2......................3.33 GT7
3.07 G44......................3.45 GM3
3.31 GW4.....................3.54 GH0
