Page 2 of 2 FirstFirst 12
Results 21 to 27 of 27

Thread: 5speed to a 6speed

  1. #21
    Join Date
    Mar 2000
    Location
    St. George, Utah.
    Posts
    980

    Wink

    Put 458 miles on and 47.7 gals. Calced to be 9.6 mpg. The weather here in southern AZ and NM is terrible wind and rain mostly continuous for the past three days. We have stopped for the night in Lordsburg NM. I'll post every night until a solid average is known.
    Denny
    2018 GMC Denali HD 2500 L5P.

  2. #22
    Join Date
    Mar 2000
    Location
    St. George, Utah.
    Posts
    980

    Talking

    We refueled in Van Horn Texas and with the help of the infamous west Texas winds even though we doing a lot of up and down in the west hill country on I 10 we noted 11.5 mpg. The six speed upgrade hung right in there at 65mph. I'll check in again tomorrow night.
    Denny
    2018 GMC Denali HD 2500 L5P.

  3. #23
    Join Date
    Mar 2000
    Location
    St. George, Utah.
    Posts
    980

    Talking

    Refueled in Van Horn, overnighted in Ft. Stockton, drove on to San Antone. Clocked 456 miles. Fueled up in New Braumfels 40.51 gals. Worked out 11.3-----. Light winds today but the west Texas hills reminded me of I 80 through Iowa. Were staying in San Antone tonight.
    More tomorrow
    Denny
    2018 GMC Denali HD 2500 L5P.

  4. #24
    Join Date
    Mar 2000
    Location
    St. George, Utah.
    Posts
    980

    Talking

    We have traveled a ways since the last post. We are now in Natchez MS to tour some old Antebellum homes. From there we go on to Pensicola to tour the Navy air museum. Looking forward to that. Mileage is holding up with an average in the high tens. Pert near got a twelve once and still holding out for at least one of those. If we don't stop and go touring elevens are easy. I will check in down the road.
    Denny
    2018 GMC Denali HD 2500 L5P.

  5. #25
    Join Date
    Mar 2000
    Location
    St. George, Utah.
    Posts
    980

    Default

    Well the cruise was wonderful and I still don't have my land legs back yet.
    We are going to hang out in Winter Garden FL for a couple more days and then start back west. We will be going north through Tenn for visit with relatives. I will begin tracking mileage when we hit the road again.
    Denny
    2018 GMC Denali HD 2500 L5P.

  6. #26

    Default

    Hey Denny. What was your mileage before you upgraded to the Edge? Exhaust?
    2011 Chevrolet Tahoe 5.3L daily driver
    • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
    • Total GM diesel miles to date : ~950K

  7. #27
    Join Date
    Mar 2000
    Location
    St. George, Utah.
    Posts
    980

    Talking

    Hi Mark:
    I'm thinking 7 to 9 with the 5 speed. I've always had the edge on the truck so can't give figures on that but suspect not much worse. The exhaust probably gave more consistent 9s. The sixth speed upgrade here in the west kicked it into the 10s. Our trip to the south east produced an average of 9.37 with a best of 11.99 and worse 7.63. Performance was great. In the East as you know is not flat with continual rolling hills that kill mileage. I kicked the edge up to level 4 and it would then hold sixth easily through those hills. We drove through the Smokeys and i was surprised at just how well it pulled those grades. Temps were well controled. Tranny never topped 170 and eng temp stayed below 215 and most of the time 190 to 195. EGTs never above 1150 most of the time 750 to 900. I used cruise most of the time. If the tranny felt it needed to shift down then it would go to 5th and back to 6th in a very short time. I could count on one hand the shifts down to 4th. Out here in the West level 3 is good. Overall I'm very happy with performance. Now I will concentrate on the suspension.
    Denny
    2018 GMC Denali HD 2500 L5P.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •