3.08 gears
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Junior Member
Joined: Jun 2001
Posts: 3
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From: Charlotte
3.08 gears
I want to change from 3.55 to 3.08 gears. I don't tow or haul heavy items just carry ladders and small tools.
I own a 97 Expedition with 3.08 gears and it runs 65mph @ 1700rpm. My 97 F150 4.6 V8,3.55g,4spd auto,lb,sc, runs 65 mph @ 2100rpm.
Can any one explain whats involed in switching these gears?
I own a 97 Expedition with 3.08 gears and it runs 65mph @ 1700rpm. My 97 F150 4.6 V8,3.55g,4spd auto,lb,sc, runs 65 mph @ 2100rpm.
Can any one explain whats involed in switching these gears?
Senior Member
Joined: Jul 1999
Posts: 306
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From: NC/PA
Well CadGuy, I have 3.73s and at 70 MPH I'm only running 2150. I don't see how your getting 2100 rpms at 65 mph with 3.55s
...??
Yes, I have had my speedo and tach checked out..
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DOGCAM
dogcam@f150guy.com
01 F-150 SC Lariat
Flareside 4X2,5.4,3:73
LS, SnugLid,Dynomax
Exhaust,Kenwood Amps,
Speakers,JL 10" Sub
...??
Yes, I have had my speedo and tach checked out..
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DOGCAM
dogcam@f150guy.com
01 F-150 SC Lariat
Flareside 4X2,5.4,3:73
LS, SnugLid,Dynomax
Exhaust,Kenwood Amps,
Speakers,JL 10" Sub
Senior Member
Joined: Apr 2001
Posts: 159
Likes: 0
From: Bolton Ontario Canada
Hi Cad Guy;
I just made the opposite change to my F150. The gear change is not too bad a job to tackle by yourself if you are prepared. If you read my post from Sunday June 24, (3.08 to 3.55 gear change complete) you can see what is involved. Don't tackle it yourself if you don't understand what needs to be done or if you don't feel confident that you can handle it. Preparation and patience are critical to making sure that the job is done right. Post a reply to my gear change thread if you have questions.
GlennMc.
I just made the opposite change to my F150. The gear change is not too bad a job to tackle by yourself if you are prepared. If you read my post from Sunday June 24, (3.08 to 3.55 gear change complete) you can see what is involved. Don't tackle it yourself if you don't understand what needs to be done or if you don't feel confident that you can handle it. Preparation and patience are critical to making sure that the job is done right. Post a reply to my gear change thread if you have questions.
GlennMc.
Senior Member
Joined: Dec 1999
Posts: 749
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From: Lakeville, Minnesota, USA
For the difference between cadguy and dogcam, the tire size is probably different, accounting for the RPMs being similar at different speeds. (ie: cadguy has smaller tires) Something to think about...
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1997 F150 XLT, Flareside , Moonlight Blue, 4x2, SC, Auto, 4.6L, 3:08's, Cargo Cover by Century, bed liner, Blue Oval reciever hitch plug, Driver Design bug deflector, Monroe Reflex Shocks, 235/70/16 Bridgestone Dueler AT's, sliding rear window, captain's chairs, Valvoline Durablend Oil, Purolator Pure One Oil Filter, and 125,000 miles and counting!
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1997 F150 XLT, Flareside , Moonlight Blue, 4x2, SC, Auto, 4.6L, 3:08's, Cargo Cover by Century, bed liner, Blue Oval reciever hitch plug, Driver Design bug deflector, Monroe Reflex Shocks, 235/70/16 Bridgestone Dueler AT's, sliding rear window, captain's chairs, Valvoline Durablend Oil, Purolator Pure One Oil Filter, and 125,000 miles and counting!
Senior Member
Joined: Feb 2000
Posts: 1,544
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From: Kalamazoo, MI, USA
I know this reply does not address your question -- but, why don't you offer to swap entire axle assemblies with someone who wants to have the 3.55?
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Senior Member
Joined: Dec 1999
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From: Lakeville, Minnesota, USA
Actually, I have never fished Mille Lacs - but not because I'm a bad Minnesotan. Our family has a cabin up on Lake Vermillion way up north. I get all the fishing I could ever want there. Either way - good fishing!
Senior Member
Joined: Jun 2001
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From: Spicewood
Y2k--good idea and I am glad you agree...I suggested this before but no one was interested...
We could even get two people together on this board who want each others diff. and get them to switch....
We have to be careful because glenn doesn't agree with this philosophy....
I have to give Glenn some credit--he is a little careful about explaining how imporatnt it is to set it up right and that it is an advanced mod not for everyone though...
We could even get two people together on this board who want each others diff. and get them to switch....
We have to be careful because glenn doesn't agree with this philosophy....
I have to give Glenn some credit--he is a little careful about explaining how imporatnt it is to set it up right and that it is an advanced mod not for everyone though...
Member
Joined: Mar 2001
Posts: 39
Likes: 0
From: Temecula, CA United States
Trying to get Gopher's attention
Hey Gopher,
Just drop a line, if you would, to
sattlerc@attens.com
I moved from Harmony about 7 years ago.
Just drop a line, if you would, to
sattlerc@attens.com
I moved from Harmony about 7 years ago.
Senior Member
Joined: Jan 2001
Posts: 158
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From: port huron mi us
swapping rear axles
hey im getting ready to swap gears for 3.55 i have 3.08 and i hate the because i have 18" wheels check on shipping to port huron mi. if its not to bad maybe we could split the diff.