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Received: with LISTAR (v0.128a; list 97up-list); Fri, 30 Jun 2000 11:29:01 -0400 (EDT)
Date: Fri, 30 Jun 2000 11:29:01 -0400 (EDT)
From: Ford Truck Enthusiasts List Server ford-trucks.com>
To: 97up-list digest users ford-trucks.com>
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Subject: 97up-list Digest V2000 #111
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97up-list Digest Wed, 28 Jun 2000 Volume: 2000 Issue: 111

In This Issue:
Swapping gears for better mileage
Re: Swapping gears for better mileage
Re: Swapping gears for better mileage
clunking noise
ADMIN: List problems

----------------------------------------------------------------------

From: "Miller, Walter K. (PS, NE)" gene.GE.com>
Subject: Swapping gears for better mileage
Date: Wed, 28 Jun 2000 15:06:49 -0700

I have a '98 F-150, 4.6L v8, auto-trans, 3.55 limited slip. I've got almost
20K on the truck and I get the customary & disgusting 12-14 MPG in city and
combined driving. Does anybody have any information or experience in
changing the gearing? I was thinking of dropping the 3.08 gears into the
rear-end but the folks at my local Ford dealership tell me I can't put the
3.08s into the limited slip. Don't really want to lose the LS if I don't
have to but I need to find a way to get better mileage.

I was also thinking of switching to 245 tires, which my neighbor has on his
'99, since they seem to run 1300 or so rpm less at cruising speed but
thought the 3.08s would be a better solution. Don't have plans to tow much
more than lightweight trailers (<3500lbs) so I don't think I'll have any
problems in that respect. I've seen the posts about the superchip and
getting better mileage but not sure if the extra cost of premium unleaded (I
live in San Jose, CA) is offset by the mileage.

Thanks,
Walter Miller


------------------------------

From: CERESJohnGaol.com
Date: Wed, 28 Jun 2000 20:56:30 EDT
Subject: Re: Swapping gears for better mileage

Walter;
What the Ford folks tell you is correct for FORD parts. Some of the
aftermarket gear folks may have a 3.08 or some number close that will fit.

Randy's ring and pinion http://www.ford-trucks.com//lc/lc.php?action=do&link=http://www.ring-pinion.com/index.html

West Coast Differential http://www.ford-trucks.com//lc/lc.php?action=do&link=http://www.differentials.com/

are two sources that seem to be knowledgable. Reider Racing is another and
there are a bunch more if you do an internet search.

That said, of you have it done you are staring at probably close to a grand
if you have it done. It will take a while to amortise that on one or two mpg
even at $2/gal.

The tires would be a cheaper way to go, and Ford can adjust the speedometer
to compensate.

John G.


------------------------------

From: "neal hamilton" theriver.com>
Subject: Re: Swapping gears for better mileage
Date: Wed, 28 Jun 2000 19:17:59 -0700

Hey Walter,

Go with the bigger tires! I had a 97 F150 with 4.6 and 3.08 gears and got pretty good milage. I could get 18-19 mpg at 65 mph. It would drop when the speed reached 75 and above to 16-17. The problem was in hill country. The truck had to downshift alot going uphill and of course it hurt the milage. So buy going to a slightly taller tire, you should reduce the rpm, and increase highway mileage. You may lose abit around town as it takes more power to get the bigger tires rolling. I've always liked going with an oversized tire on my vehicles but was afraid could not do it with the 3.08 gears as it would lug the engine to much. I eventually went with a 255/70/16. It didn't seem to effect the mileage much around town and I couldn't tell the difference in power. The speedo was only off about 2 mph and the looks and handling were much better. Remember, the cost of a new ring and pinion will take along time to recover. If you need new tires, you kill two birds with one stone by going with the taller tire. Good Luck.

Neal Hamilton
----- Original Message -----
From: "Miller, Walter K. (PS, NE)" gene.GE.com>
To: <97up-listford-trucks.com>
Sent: Wednesday, June 28, 2000 3:06 PM
Subject: [97up-list] Swapping gears for better mileage


> I have a '98 F-150, 4.6L v8, auto-trans, 3.55 limited slip. I've got almost
> 20K on the truck and I get the customary & disgusting 12-14 MPG in city and
> combined driving. Does anybody have any information or experience in
> changing the gearing? I was thinking of dropping the 3.08 gears into the
> rear-end but the folks at my local Ford dealership tell me I can't put the
> 3.08s into the limited slip. Don't really want to lose the LS if I don't
> have to but I need to find a way to get better mileage.
>
> I was also thinking of switching to 245 tires, which my neighbor has on his
> '99, since they seem to run 1300 or so rpm less at cruising speed but
> thought the 3.08s would be a better solution. Don't have plans to tow much
> more than lightweight trailers (<3500lbs) so I don't think I'll have any
> problems in that respect. I've seen the posts about the superchip and
> getting better mileage but not sure if the extra cost of premium unleaded (I
> live in San Jose, CA) is offset by the mileage.
>
> Thanks,
> Walter Miller
>
> ==========================================================
> To unsubscribe:
> http://www.ford-trucks.com/mailinglist.html#item3
> Please remove this footer when replying.
>
>


------------------------------

From: "Mark Browning" hotmail.com>
Subject: clunking noise
Date: Thu, 29 Jun 2000 13:06:43 EDT

Hey well i was going home for lunch today and i noticed whaen i left the
parking lot that a clunk came from the trucks front end. and half way home i
notice it again, when i accelerated from the red light it clunked again
right at take off.. any suggestions?????

thanks
________________________________________________________________________


------------------------------

Date: Fri, 30 Jun 2000 12:22:18 -0400
From: Ken Payne ford-trucks.com>
Subject: ADMIN: List problems

Some of the list subscribers may have missed some list
mail yesterday and today. Our dedicated hosting company
made changes to our sendmail config 3 days ago without
realizing I had customized it. In the process of trying
to get everything working correctly, I broke this list
queue.

Everything should work normally now.

Ken Payne
Admin, Ford Truck Enthusiasts



------------------------------

End of 97up-list Digest V2000 #111
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