2008 Nissan Frontier

Replying to: najawa (Jan 31, 2009 11:37 am)

Did the Dealer double check the hydraulic clutch line in your 6-Speed to be sure there's no air in it? It's a simple process; you can even do it in your driveway with a helper. It's a long shot (given that yours seems to be temperature dependent), but if air in the line is causing the clutch to not fully disengage, you could get grinding. I guess the tiny upside is that your powertrain warranty will cover you beyond 36K Miles if things get worse.

Replies to this message:
• najawa (Feb 01, 2009 10:03 am)
  • asa (Feb 01, 2009 1:37 pm)
    • najawa (Feb 15, 2009 9:26 am)

Replying to: rodranier (Jan 31, 2009 7:42 pm)

Replies to this message:
• rodranier (Feb 01, 2009 10:16 am)

Replying to: asa (Feb 01, 2009 8:54 am)

Replies to this message:
• asa (Feb 01, 2009 1:37 pm)
  • najawa (Feb 15, 2009 9:26 am)

Replying to: asa (Feb 01, 2009 9:01 am)

Replying to: najawa (Feb 01, 2009 10:03 am)

The 6-Speed has double cone synchronizers in 1st, 3rd and 4th. 2nd Gear has a triple cone synchronizer. That would leave 5th and 6th with no synchros, which is pretty typical. I think (but am not certain) it's beacuse the gear ratio differences (hence gear rotating speeds) become less as shifts to high gears are made. But despite the Dealer's techno-speak, there shouldn't be any grind in any gear at any time. You can also call synchonizers "baulk rings" to stun them with customer knowledge. Your letter ton NIssan can't hurt. You might try a different dealer if that's possible. I'm saddled with a slack dealership myself and it's very frustrating.
 
The service manual says that a hard to shift tansmission can be due to (a) the wrong oil (b) low oil or high oil, (c) a worn shift control linkage, (d) worn synchros or (e) a damaged insert spring. You said you had factory oil which is a GL-4 grade and is the ONLY grade that should be used in the 6-Speed transmission. The oil level is another easy-to-check item. Keep us posted.

Replies to this message:
• najawa (Feb 15, 2009 9:26 am)

Replying to: rodranier (Jan 31, 2009 7:42 pm)

Replying to: asa (Feb 01, 2009 1:37 pm)

Replies to this message:
• asa (Sep 02, 2009 4:15 pm)
  • craig32 (Sep 03, 2009 12:19 am)

Replying to: craig32 (Sep 01, 2009 11:48 am)

This question will yield fanatics on both sides of the equation, with tales of success flogging it and babying it. I'm a follow-the-owners-manual kind of guy based on the 200,000+ Miles we seem to get on all of our vehicles and none has ever been put out to pasture because of engine trouble and none has even burned oil. Redlining machinery of any kind doesn't seem like a sound way to make things last, but to each their own.
 
But, given that many others have raced their new motors to extremes and lived to tell about it, you're probably fine and I wouldn't worry. I take it that you have a 6-Speed and that the truck is so wonderfully quiet that you forgot to upshift?

Replies to this message:
• craig32 (Sep 03, 2009 12:19 am)

Replying to: asa (Sep 02, 2009 4:15 pm)