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08-26-2018
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#1 |
 
Join Date: Aug 2015
Location: Pittsburgh, PA
Posts: 152
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4.10 Gears!
Been a great ZR-1 weekend. Went to Carlisle on Friday then spent Saturday installing a swap-out diff with a 4.10 gearset.
Big shout out to Phil Wasinger - He rebuilt a 2nd-hand Dana 44 for me: Viper gearset, new clutches and bearings. Contact pattern is picture-perfect! I am saving my original 12k mile original diff intact. Also added ZF Doc beam plates and Marc's speedo correction gears. Thanks also to Dempsey, he gave me a few tips as we chatted for a while at his Carlisle booth on Friday about wrestling the C-beam out. Here are a few pics. I made up a fixture to keep the diff square on the hoist so that I was able to handle it as a 1-man job. And she runs great!! Can't quite lift the front tires off the ground but a nice upgrade.
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Roger 1990 ZR-1 #2699 Black on Black 15,000 miles Full-time secondaries, 4.10 gears, C-beam plates, ported top end |
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08-28-2018
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#2 |
Join Date: Jul 2013
Location: Central Iowa
Posts: 190
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Re: 4.10 Gears!
A great upgrade for more zip from the ZR-1!
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[CENTER][SIZE=4][COLOR=red]1990 ZR-1 Red / Red[/COLOR][/SIZE][/CENTER] |
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08-28-2018
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#3 |
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Join Date: Aug 2015
Location: Pittsburgh, PA
Posts: 152
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Re: 4.10 Gears!
It was an enjoyable project and I was able to put my new lift to good use.
Phil had the case bead blasted and added the drain plug for me. Here is a pic of the gear pattern he achieved.
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Roger 1990 ZR-1 #2699 Black on Black 15,000 miles Full-time secondaries, 4.10 gears, C-beam plates, ported top end |
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08-29-2018
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#4 |
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Join Date: Jun 2018
Location: Elko mn
Posts: 49
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Re: 4.10 Gears!
Driving impressions?
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08-29-2018
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#5 |
Join Date: Mar 2018
Location: Norway
Posts: 345
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Re: 4.10 Gears!
Agree, 4:10 is a big difference to the original 3:45. Could never go back now [emoji16]
Sent from my SM-G955F using ZR-1 Net Registry mobile app
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Roy Martin 1994 ZR-1 #112 Admiral Blue/Black Dana 4:10 Aluminum flywheel Corsa exhaust Watson headers Haibeck chip 470 HP/399 RWHP 1991 ZR-1 #400 White/Red (SOLD) Dana 4:10 Powder coated engine Haibeck performance chip Borla exhaust |
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08-29-2018
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#6 |
  Join Date: Feb 2007
Location: Komoka, Ontario, Canada
Posts: 588
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Re: 4.10 Gears!
Well done. I found this to be a great mod. One may have an extra shift in the 1/4, but so much better for street and road course. With headers and Corsas, I can cruise at 75 in 6th at about 2200 and have an easy conversation with the passenger.
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1991 ZR-1 (SN666) - Haibeck 510; 410s, Corsa, SW Headers; Hurst SS; DeWitts Rad; RC Injectors; LEDs throughout; `93 MF Sawblades 2016 Z06 - Stock 1971 Stingray 454 LS5 - Sold |
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08-29-2018
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#7 | |
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Join Date: Aug 2015
Location: Pittsburgh, PA
Posts: 152
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Re: 4.10 Gears!
Quote:
 There is a straightaway near my house. Used to be that I would enter the straightaway at 20mph, downshift to first in a rolling takeoff and hit 7k fairly quickly and i was at 90 barely into second gear. Now i reach 7k in first so quick I was not prepared to shift so quickly. Can't wait to take it out again!
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Roger 1990 ZR-1 #2699 Black on Black 15,000 miles Full-time secondaries, 4.10 gears, C-beam plates, ported top end |
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08-30-2018
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#8 |
Join Date: Jun 2014
Location: Cincinnati, OH
Posts: 10
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Re: 4.10 Gears!
Nice. Thanks for the pics. I find that I do alot of 1 to 3 shifts with 4.11s in town. Thats kind of a good thing since its usually the 2nd gear synchros that go bad in in ZF6s.
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91 Corvette ZR-1 #1346 |
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