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#1 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: Stock rear gear ratio info
Here is a 70 C10 power team chart for you. It really helps to post what year and series you have when asking a question like this.
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Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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#2 |
Registered User
Join Date: Dec 2012
Location: Dorr MI
Posts: 176
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Re: Stock rear gear ratio info
Thanks Tim, but yes it is a 1970 C10. I didnt know if mine had a different ratio than 3.07 because at 75mph the truck runs at about 3800rpms or so. I do have a built TH350 and 2200 stall converter however so that is probably part of the higher rpms.
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#3 | |
Registered User
Join Date: Oct 2010
Location: Sag Harbor NY
Posts: 103
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Re: Stock rear gear ratio info
Quote:
I have a burb that was a 6cyl 4spd and a pickup with 327 240hp 4spd They both have the 10 bolt rear. The truck screams in 4th gear at 50mph Thanks
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1985 Custom Deluxe long bed 305 3 on tree 2015 Silverado "Great White"1987 K20 dump and plow 1968 K20 327 long bed 4spd big blue 68K20 SuburPan 4spd 79C30 L96 6L90e 86 K10 plow |
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#4 | |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: Stock rear gear ratio info
Quote:
All you needed to do was click on the link in my signature, most are there. http://67-72chevytrucks.com/vboard/s...05&postcount=5 4.57 gears spinning a 31" (stock 7-17.5)tire @ 50 mph = about 2475 rpm, that isn't exactly screaming. The indirect drive T-221 t-cases were never quiet.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban Last edited by SS Tim; 09-13-2016 at 07:50 PM. |
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#5 |
Registered User
Join Date: Oct 2010
Location: Sag Harbor NY
Posts: 103
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Re: Stock rear gear ratio info
Thanks, I found the link right after I posted. So the T221 makes that jet sound normally? It starts whining at 40 and close to 50 I need ear protection.
__________________
1985 Custom Deluxe long bed 305 3 on tree 2015 Silverado "Great White"1987 K20 dump and plow 1968 K20 327 long bed 4spd big blue 68K20 SuburPan 4spd 79C30 L96 6L90e 86 K10 plow |
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#6 | |
Registered User
Join Date: Jul 2013
Location: Moro, Illinois
Posts: 7
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Re: Stock rear gear ratio info
Quote:
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#7 |
Registered User
Join Date: Nov 2008
Location: Gwinnett GA
Posts: 1,803
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Re: Stock rear gear ratio info
I always thought 3.08 and the granny 4 speed was a sweet combo. No need for overdrive and can still pull a house in first. Just watch the gap between gears!
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1982 K10 SWB 1987 V20 - Sold - Doh! |
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#8 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: Stock rear gear ratio info
Suggested reading and in hand resources.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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#9 |
Registered User
Join Date: Oct 2010
Location: Sag Harbor NY
Posts: 103
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Re: Stock rear gear ratio info
Thanks, that's great I wish I had them. Unable to download the manual onto my phone. Just need to see diagram or know where fill is for cardan joints.
__________________
1985 Custom Deluxe long bed 305 3 on tree 2015 Silverado "Great White"1987 K20 dump and plow 1968 K20 327 long bed 4spd big blue 68K20 SuburPan 4spd 79C30 L96 6L90e 86 K10 plow |
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#10 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: Stock rear gear ratio info
Here...
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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