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05-08-2018, 03:34 PM
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#1 |
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Registered User
 
Join Date: Nov 2010
Location: LITTLETON NH
Posts: 106
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Pinion angle severe but seems to be stock
I’m getting back to work on my 1965 short box Fleetside Chevy. I have put new stock rear springs and bushings and it has a 295-50-15 Tire. The spring perches appear to be stock. The weld certainly looks factory. I have a 15 degree pinion angle, with the pinion pointing up towards the tranny. This is severe to me. The tranny angle is approximately 8 degrees pointing down towards the rear differential. I realize I need to pick the engine and tranny (zz427 & Tremec TKO600) up a few degrees. The front height of the truck is without the front sheet metal on it. But this certainly can not change the pinion angle that much. The truck originally had a 6 cyl. engine with a 3 on the tree. The front springs are new stock too. I feel I am missing something obvious and stupid. The angle is so severe the only fix seems to be to cut and change the perches. Has anybody seen such a severe pinion angle from the factory? I have attached a couple of picks showing the angle and the current stance.
THANK YOU! |
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05-08-2018, 11:39 PM
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#2 |
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60-66 Nut
 Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,251
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Re: Pinion angle severe but seems to be stock
The truck appears to be sitting rather high. I'm thinking once you get everything installed on the truck it should drop down a bit which will reduce your current pinion angle.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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05-09-2018, 12:19 PM
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#3 |
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Registered User
Join Date: Jul 2009
Location: Menifee, CA
Posts: 471
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Re: Pinion angle severe but seems to be stock
For a 2WD half ton it seems like it has an excessive amount of ground clearance. Are you sure you have the correct springs and shocks?
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05-09-2018, 01:49 PM
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#4 |
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Post Whore
 
Join Date: May 2015
Location: Alabama
Posts: 14,663
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Re: Pinion angle severe but seems to be stock
that is excessive. ...around 3deg is about average on trans and rearend. ...and I agree...it looks to sitting high...
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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05-10-2018, 06:40 AM
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#5 |
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Senior Member
Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
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Re: Pinion angle severe but seems to be stock
The new springs are not wound like the old progressive springs. That may make them a bit taller. Also there is the heavy duty spring that is for the Suburban that will give you just what you have going on. The truck will settle some as you get all the weight on it but I dont think it will go the 3 inches it needs to get you a good pinion angle.
Jimmy
__________________
60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic |
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05-10-2018, 07:05 AM
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#6 |
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Registered User
Join Date: Nov 2010
Location: LITTLETON NH
Posts: 106
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Re: Pinion angle severe but seems to be stock
Thank you all very much for your replies & the help. The Springs were all ordered as stock springs for a 1965. Can anybody tell me what the stock height should be so I can measure it?
Thanks again for all the input! |
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05-10-2018, 08:15 AM
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#7 |
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Senior Member
 
Join Date: Feb 2014
Location: new smyrna beach fl / 29 palms cal
Posts: 1,727
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Re: Pinion angle severe but seems to be stock
They look like the springs from my friends suburban
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05-10-2018, 11:25 AM
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#8 |
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Registered User
Join Date: Oct 2017
Location: Calgary, Alberta
Posts: 210
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Re: Pinion angle severe but seems to be stock
My 66 GMC was sitting around 10 degrees with what i believe were the stock springs.
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05-10-2018, 04:16 PM
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#9 |
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Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,663
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Re: Pinion angle severe but seems to be stock
on these model trucks, are the 3 center coils not supposed to be nearly touching each other?like in this thread pics......http://67-72chevytrucks.com/vboard/s...d.php?t=763522 .....his are spread out...
Last edited by mongocanfly; 05-10-2018 at 04:38 PM. |
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05-10-2018, 11:27 PM
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#10 | |
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60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,251
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Re: Pinion angle severe but seems to be stock
As stated in that thread, the OP there has what is known as progressive, or variable rate springs. Those were available from the factory although what the OP in that thread has likely have settled a bit from it's original height.
Quote:
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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