• If this is your first visit to the iboats.com Boating Forums, be sure to check out the FAQ. To post a question or comment, begin by signing up. To start viewing messages, select the forum that you want to visit from the selection below.


Announcement

Announcement Module
Collapse

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old topics or hijack existing topics. Old topics of a technical nature are like a library book, Please do not write in them.

2. Old topics should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís topic (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new topic of your own.

4. If you have a question for the original poster (OP) and the topic is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old topic.

5. By starting your own topic, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís topic. And those answers will be specific to your particular issue.

6. Please do not post to topics that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any topic that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old topic.

7. Posting at the end of any topic is considered to be hijacking the original posters topic which in turn subjects the topic to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive topic asking you not to reply to old topics. The Red banner will read: Please note this topic has been inactive for 90 days. For the best results, please start a new topic.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

7.4 V-drive transmission noise

Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts


  • 7.4 V-drive transmission noise

    I own a 1991 Searay Sundancer 310 powered by two 310HP, 7.4L V-8s. The boat has V-drive configurations. Lately, when shifting from neutral to either forward or reverse (port engine only) instead of a smooth transition into gear there is a bit of a clunk sound. It goes into gear all right and stays there but the noise is not normal. There is no resistance in the shifter lever at the dash in either direction. The starboard transmission shifts correctly so there is a distinct difference between the two. Additionally there is transmission "noise" kind of like the whining gears of a good old 1953 Chevy truck or something of that vintage. The noise can only be heard at low speeds around the dock. The RPMs of both engines are around 900 with the accelerator levers fully depressed at the helm. Starboard shifts beautifully at this engine speed. No cables have ever been pulled, replaced or adjusted. The engines/transmissions have never been pulled.

    This is a freshwater boat used at Lake Powell, UT maybe 6-7 times/year. Engine hours about 1100.

    Would anybody care to offer a diagnosis?

    Thanks.


  • #2
    Re: 7.4 V-drive transmission noise

    What kind of V drive and transmission? have you checked the oil in it?

    how about some model numbers or serial numbers for the engines so we can look them up and see what you have. You posted in the OMC forum, but I don't think SeaRay was using OMC in 91.
    Don S.

    sigpic

    Please, no PM's (Private Messages) regarding boat/engine problems.
    That is what the forums are for.
    Only forum/moderator issues will be answered in PM's.

    Comment



    • #3
      Re: 7.4 V-drive transmission noise

      Originally posted by Don S View Post
      What kind of V drive and transmission? have you checked the oil in it?

      how about some model numbers or serial numbers for the engines so we can look them up and see what you have. You posted in the OMC forum, but I don't think SeaRay was using OMC in 91.
      Thank you, Don. I have checked the fluids numerous times and has always been steady. No evidence of tranny leak. I did not happen to check it on this occasion. I am 500mi from the boat at this time and may be a month or so before I can return and obtain serial #'s.

      Regarding the OMC post. These are 454 cu in engines manufactured by GM. Posts by other boaters mostly have to do with shift problems on I/O's or outboards, not with direct or V-drive configurations. My boat shifts ok. It's the noise and the bit of torque that goes with it which has me concerned. Your suggestion as to a better place to post would be welcome.

      Comment



      • #4
        Re: 7.4 V-drive transmission noise

        Can you take a picture of what you have?
        1998 Wellcraft Eclipse 24 Cuddy
        Volvo Penta Duo-Prop 7.4L "LK"

        2006 Sun Tracker Party Barge 21
        Mercury 90 4-Stroke FI
        "Common sense is not very common"
        "Failing to prepare is preparing to fail." -- John Wooden

        Comment

        Working...
        X