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#1
03-20-2002, 09:49 PM
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Anyone know of any websites where I can get a basic understanding of pontiac rearends? I want to be able to identify mine.
I have a 78 T/A and all I know about the axles is that I was told it had 4:11 gears. (feels right and tach confirms [img]/infopop/emoticons/icon_frown.gif[/img] ) The axle has been cut and rewelded on both sides but I don't know if it was a performance mod or repair. (the car used to be street raced) Any help for me? Wayne
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1978 TransAm 1979 Firebird 1971 Dodge Pickup 1995 Impalla SS |
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#2
03-20-2002, 09:49 PM
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Anyone know of any websites where I can get a basic understanding of pontiac rearends? I want to be able to identify mine.
I have a 78 T/A and all I know about the axles is that I was told it had 4:11 gears. (feels right and tach confirms [img]/infopop/emoticons/icon_frown.gif[/img] ) The axle has been cut and rewelded on both sides but I don't know if it was a performance mod or repair. (the car used to be street raced) Any help for me? Wayne
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1978 TransAm 1979 Firebird 1971 Dodge Pickup 1995 Impalla SS |
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#3
03-21-2002, 12:22 AM
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2 PZ
2 PY 2 PX 2 PW 2 PU 2 PT 2 PS Notice the pattern here. Only problem is many of us builders have been gutting these rearends for decades, & in many cases, often build off of who knows what coded housing. Moral...used, you never know what you got till you pull the cover 2 PZ= '77 1/2-79 (Z-28 w 4 spd) 3.73 posi 2 PY= '78-79-80 (used in '78 4spd T/A) 3.42 posi 2 PX= 77-78-79 TransAm usage (used in '78 W72 auto T/A) 3.23 posi
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Buzzards gotta eat... same as worms. |
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#4
03-21-2002, 12:24 AM
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All '71-81 F-bodies came with 8.5 corporate 10 bolts. It maybe possible your's has had it's ends trimmed for c-clip elims.
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Buzzards gotta eat... same as worms. |
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#5
03-21-2002, 12:37 PM
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yea, OPH knows the rear axles quite well.
I assume you have a 10-bolt cover. gear ratio: Rotate tires once and count the driveshaft rotation...4 times and a tad more. Both tires off the ground and rotated like a locked posi. or pull the cover and read the pionion face or ringgear side for 41:10 or some other number ratio...then run that into a calculator. H.I Stud
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12.24/111.6MPH/1.76 60'/28"/3.54:1/SP-TH400/469 R96A/236-244-112LC/1050&TorkerI//3850Lbs//15MPG/89oct Sold 2003: 12.00/112MPH/1.61 60'/26"x3.31:1/10"/469 #48/245-255-110LSA/Q-Jet-Torker/3650Lbs//18MPG 94oct Sold 1994: 11.00/123MPH/1.50 60'/29.5"x4.10:1/10"/469 #48/245-255-110LSA/Dual600s-Wenzler/3250Lbs//94oct |
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#6
03-22-2002, 10:10 AM
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Thanks for the reponse guys,
I regret I don't know exactly what the code is or where to find it, but I'll try and find it this weekend. It is a 10 bolt tho... And on both sides about 4 inchs past the housing it has been cut and a smaller axle housing has been welded on. The reason for this I do not know. I don't even know what a c clip is. <blush> . Perhaps this weekend I can get under it and take a better look. Thanks guys, I know it takes nerve to answer one so obviously ignorant. But I do appreciate it greatly. Wayne
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1978 TransAm 1979 Firebird 1971 Dodge Pickup 1995 Impalla SS |
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