Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend> th 350 "rattles" under hard acceleration
User Name
lost password?   |   register now

Thread: th 350 "rattles" under hard acceleration Reply to Thread
Send Trackbacks to (Separate multiple URLs with spaces) :

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
07-09-2007 08:50 PM
31choptop I dont hook up my vac. advance it is really to improve fuel mileage more than anything else. tuning the main jets is time consuming. you need to start with a couple sets of fresh plugs, a lonely stretch of road. you will want to check the high speed system without the secondaries coming on, and with the secondaries open. normally if you dont have any backfiring, popping or miss, or loss of power under accel or hrd cruise the carb is probably fine. unless you like tinkering for tinkerings sake
07-09-2007 08:35 PM
Greg T You may want to check the flexplate. It may be cracked and distorting under a hard pull.
07-09-2007 12:11 PM
accidntprone coool. ok. so... any advice on tuning the main jets? and how about the vaccum advance? im a new to this, but taking the car to a doctor is only for major works, so any "how-to" advice would be coool. thanks!
07-08-2007 08:47 PM
31choptop I dont think the flow being reduced on a stock motor would be that big of a problem, but if you want to cut and weld new sections in why not! the sun shell refers to auto trans internals.. if it was the shell rubbing on the case it would likely cause severe vibration when ever the planetary was in motion plus there would be a lot of noise. the idle mixture screws are for idle only, wont have any effect on high speed system. but the main jets would! Brian
07-08-2007 12:54 PM
accidntprone thanks. illl check my timing, and re-adjust ( if needed) the carb also, thanks chop top and duece. but... whats the "sun shell rubbing the case, bell mouthed and abused when bushings go out". ? im a starter to this. i coulda sworn id adjusted the idle/mixture screws on the carb (original two barrel) previously. and i could have sworn ,but i have to look into it somemore, that i threaded them out 2 & 1/2 turns, but like i said i coulda sworn. also. another thing thats off subject. my uncle just gave me some used headers, and two of the pipes are smashed in, semi. not eccesive, but still. will this be a problem? or should i try and pull the dents out a little? cutting and welding is no problem, but looking to see what you guys think about a semi-imperfect exhaust. thanks
07-08-2007 08:15 AM
31choptop I tend to agree w/ Deuce. back off your advance a little and or add octane boost. Brian
07-08-2007 02:06 AM
jakeshoe Could be the sun shell rubbing the case. They get bell mouthed when abused and worn bushings give it even more runout and they do get into the case sometimes.
07-07-2007 11:48 AM
Deuce Could be the engine spark knocking ...

Check your timing ... or increase the octane rating fuel you use.

In the timing area ... a bad vacuum advance will do that ... or the timing set too high.
07-07-2007 11:32 AM
th 350 "rattles" under hard acceleration

hello. ive got a 69 chevelle with a 350 tranny, 307 block. stock. problem being that when i accelerate semi-hard, i hear a grinding, rattling noise. it doesnt do the noise in park. its not a hotrod, but itd still be good to get a nice pick up without her sounding like shes choking. any help?

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 08:54 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.