| 3.70 FD Installed [message #184239] |
Thu, 13 September 2012 03:00  |
Jiffyjet2
Messages: 86
Registered: November 2008
Karma: 0
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Member |
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I got the new 3.70 final drive from Jim K and had it installed. Got it back today and WOW! What a difference. I haven't driven the Pumpkin much but the performance is remarkable. Went up and down a few hills and compared to the old 3.07 it was night and day. I wasn't totally surprised, that's why I changed it, but I'm more impressed than I thought I would be. It's a different coach.
Jess
'74 Canyonlands
"the Great Pumpkin"
Tacoma, Washington
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| Re: [GMCnet] 3.70 FD Installed [message #184256 is a reply to message #184239] |
Thu, 13 September 2012 08:10  |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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I feel the same way, our 3:70 is incredible ! The only way to go with the 403
engine !
Ray
Ray & Lisa
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Jiffyjet2 <Jiffyjet2@aol.com>
To: gmclist@temp.gmcnet.org
Sent: Thu, September 13, 2012 3:00:07 AM
Subject: [GMCnet] 3.70 FD Installed
I got the new 3.70 final drive from Jim K and had it installed. Got it back
today and WOW! What a difference. I haven't driven the Pumpkin much but the
performance is remarkable. Went up and down a few hills and compared to the old
3.07 it was night and day. I wasn't totally surprised, that's why I changed it,
but I'm more impressed than I thought I would be. It's a different coach.
--
Jess
'74 Canyonlands
"the Great Pumpkin"
Tacoma, Washington
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: 3.70 FD Installed [message #184259 is a reply to message #184239] |
Thu, 13 September 2012 08:25 |
jknezek
Messages: 1057
Registered: December 2007
Karma: 5
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Senior Member |
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| Jiffyjet2 wrote on Thu, 13 September 2012 04:00 |
I got the new 3.70 final drive from Jim K and had it installed. Got it back today and WOW! What a difference. I haven't driven the Pumpkin much but the performance is remarkable. Went up and down a few hills and compared to the old 3.07 it was night and day. I wasn't totally surprised, that's why I changed it, but I'm more impressed than I thought I would be. It's a different coach.
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Really feel the same about the 3.55 in my '76 455. Made a huge difference especially towing. JimK has a quality product that has great upside and I haven't noticed any downside in terms of fuel economy. One of those improvements that everyone should think about if they plan to tackle anywhere with even moderate hills. One of those no-brainers if you plan to tow anything heavier than 1500lbs.
Thanks,
Jeremy Knezek
1976 Glenbrook
Birmingham, AL
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